h918 relocked after flashing (twice)

hi, there is an H91810u here that gets re-locked after flashing.

I have unlocked it twice but still gets locked after flashing stock firmware

8/18/2018 11:20:26 PM: LG 2-3G Tool v9.52
8/18/2018 11:20:26 PM: supported models: 1559
8/18/2018 11:20:26 PM:
8/18/2018 11:23:38 PM: Mode: Normal
8/18/2018 11:23:38 PM: Model: LGH918AT
8/18/2018 11:23:38 PM: Build version: May 28 201810:09:54May 14 201821:00:00LGH918AT
8/18/2018 11:23:38 PM: SW Version: MPSS.TH.2.0.1.c3-00045-M8996FAAAANAZM-1.145041.1.149166.1
8/18/2018 11:23:39 PM: IMEI: 35222708134445-2
8/18/2018 11:23:39 PM: BlueTooth Address: 00:00:00:00:00:00
8/18/2018 11:23:39 PM: Phone Code:
8/18/2018 11:23:39 PM: Elapsed: 1 secs. --> (v9.52)
8/18/2018 11:23:39 PM:
8/18/2018 11:23:39 PM: Checking Login and Password...
8/18/2018 11:24:06 PM: OK
8/18/2018 11:24:06 PM: Ballance:
8/18/2018 11:24:06 PM: 40 crd.
8/18/2018 11:24:08 PM: You have 40 credit(s) left. This operation takes 10 credits.Continue?
8/18/2018 11:24:08 PM: Yes
8/18/2018 11:24:11 PM: Searching modem interface...
8/18/2018 11:24:11 PM: found COM7
8/18/2018 11:24:11 PM: Reading data from phone...
8/18/2018 11:24:11 PM: OK
8/18/2018 11:24:11 PM: IMEI: 352227081344452
8/18/2018 11:25:55 PM: Checking root rights...
8/18/2018 11:25:57 PM: OK
8/18/2018 11:26:02 PM: Writing zTool...
8/18/2018 11:26:02 PM: OK
8/18/2018 11:26:02 PM: SW Version: H91810u
8/18/2018 11:26:02 PM: Initialization zTool... (this can take 1-2 minutes)
8/18/2018 11:26:34 PM: OK
8/18/2018 11:26:34 PM: Reading data from phone...
8/18/2018 11:27:08 PM: OK
8/18/2018 11:27:08 PM: Calculating...
8/18/2018 11:27:09 PM: OK
8/18/2018 11:27:09 PM: Searching server...
8/18/2018 11:28:13 PM: OK
8/18/2018 11:28:13 PM: Waiting for server answer...
8/18/2018 11:28:15 PM: OK
8/18/2018 11:28:15 PM: Initialization zTool... (this can take 1-2 minutes)
8/18/2018 11:28:15 PM: OK
8/18/2018 11:28:15 PM: Reading data from phone...
8/18/2018 11:28:20 PM: OK
8/18/2018 11:28:20 PM: Unlocking done
8/18/2018 11:28:20 PM: Elapsed: 251 secs. --> (v9.52)
8/18/2018 11:28:20 PM:


8/19/2018 1:47:49 AM: LG 2-3G Tool v9.52
8/19/2018 1:47:49 AM: supported models: 1559
8/19/2018 1:47:49 AM:
8/19/2018 1:50:16 AM: Reading timeout, check cable
8/19/2018 1:50:16 AM: Error Code: ReadInfo,1,1
8/19/2018 1:50:16 AM: Elapsed: 2 secs. --> (v9.52)
8/19/2018 1:50:16 AM:
8/19/2018 1:53:10 AM: Mode: Normal
8/19/2018 1:53:10 AM: Model: LGH918AT
8/19/2018 1:53:10 AM: Build version: May 28 201810:09:54May 14 201821:00:00LGH918AT
8/19/2018 1:53:10 AM: SW Version: MPSS.TH.2.0.1.c3-00045-M8996FAAAANAZM-1.145041.1.149166.1
8/19/2018 1:53:10 AM: IMEI: 35222708134445-2
8/19/2018 1:53:10 AM: BlueTooth Address: 00:00:00:00:00:00
8/19/2018 1:53:10 AM: Phone Code:
8/19/2018 1:53:10 AM: Elapsed: 1 secs. --> (v9.52)
8/19/2018 1:53:10 AM:
8/19/2018 1:53:28 AM: Mode: Normal
8/19/2018 1:53:28 AM: Model: LGH918AT
8/19/2018 1:53:28 AM: Build version: May 28 201810:09:54May 14 201821:00:00LGH918AT
8/19/2018 1:53:28 AM: SW Version: MPSS.TH.2.0.1.c3-00045-M8996FAAAANAZM-1.145041.1.149166.1
8/19/2018 1:53:28 AM: IMEI: 35222708134445-2
8/19/2018 1:53:28 AM: BlueTooth Address: 00:00:00:00:00:00
8/19/2018 1:53:28 AM: Phone Code:
8/19/2018 1:53:28 AM: Elapsed: 1 secs. --> (v9.52)
8/19/2018 1:53:28 AM:
8/19/2018 1:53:28 AM: Checking Login and Password...
8/19/2018 1:54:00 AM: OK
8/19/2018 1:54:00 AM: Ballance:
8/19/2018 1:54:00 AM: 0 crd.
8/19/2018 1:54:00 AM: Not enough credits
8/19/2018 1:58:46 AM: Mode: Normal
8/19/2018 1:58:46 AM: Model: LGH918AT
8/19/2018 1:58:46 AM: Build version: May 28 201810:09:54May 14 201821:00:00LGH918AT
8/19/2018 1:58:46 AM: SW Version: MPSS.TH.2.0.1.c3-00045-M8996FAAAANAZM-1.145041.1.149166.1
8/19/2018 1:58:46 AM: IMEI: 35222708134445-2
8/19/2018 1:58:46 AM: BlueTooth Address: 00:00:00:00:00:00
8/19/2018 1:58:46 AM: Phone Code:
8/19/2018 1:58:46 AM: Elapsed: 0 secs. --> (v9.52)
8/19/2018 1:58:46 AM:
8/19/2018 1:59:00 AM: Mode: Normal
8/19/2018 1:59:00 AM: Model: LGH918AT
8/19/2018 1:59:00 AM: Build version: May 28 201810:09:54May 14 201821:00:00LGH918AT
8/19/2018 1:59:00 AM: SW Version: MPSS.TH.2.0.1.c3-00045-M8996FAAAANAZM-1.145041.1.149166.1
8/19/2018 1:59:00 AM: IMEI: 35222708134445-2
8/19/2018 1:59:00 AM: BlueTooth Address: 00:00:00:00:00:00
8/19/2018 1:59:00 AM: Phone Code:
8/19/2018 1:59:00 AM: Elapsed: 1 secs. --> (v9.52)
8/19/2018 1:59:00 AM:
8/19/2018 1:59:00 AM: Checking Login and Password...
8/19/2018 1:59:02 AM: OK
8/19/2018 1:59:02 AM: Ballance:
8/19/2018 1:59:02 AM: 0 crd.
8/19/2018 1:59:02 AM: Not enough credits
8/19/2018 2:01:59 AM: Mode: Normal
8/19/2018 2:01:59 AM: Model: LGH918AT
8/19/2018 2:01:59 AM: Build version: May 28 201810:09:54May 14 201821:00:00LGH918AT
8/19/2018 2:01:59 AM: SW Version: MPSS.TH.2.0.1.c3-00045-M8996FAAAANAZM-1.145041.1.149166.1
8/19/2018 2:01:59 AM: IMEI: 35222708134445-2
8/19/2018 2:01:59 AM: BlueTooth Address: 00:00:00:00:00:00
8/19/2018 2:01:59 AM: Phone Code:
8/19/2018 2:01:59 AM: Elapsed: 1 secs. --> (v9.52)
8/19/2018 2:01:59 AM:
8/19/2018 2:01:59 AM: Checking Login and Password...
8/19/2018 2:02:01 AM: OK
8/19/2018 2:02:01 AM: Ballance:
8/19/2018 2:02:01 AM: 30 crd.
8/19/2018 2:02:06 AM: You have 30 credit(s) left. This operation takes 10 credits.Continue?
8/19/2018 2:02:06 AM: Yes
8/19/2018 2:02:08 AM: Searching modem interface...
8/19/2018 2:02:08 AM: found COM7
8/19/2018 2:02:08 AM: Reading data from phone...
8/19/2018 2:02:08 AM: OK
8/19/2018 2:02:08 AM: IMEI: 352227081344452
8/19/2018 2:02:08 AM: Adb device not found
8/19/2018 2:02:08 AM: Elapsed: 3 secs. --> (v9.52)
8/19/2018 2:02:08 AM:
8/19/2018 2:03:53 AM: Mode: Normal
8/19/2018 2:03:53 AM: Model: LGH918AT
8/19/2018 2:03:53 AM: Build version: May 28 201810:09:54May 14 201821:00:00LGH918AT
8/19/2018 2:03:53 AM: SW Version: MPSS.TH.2.0.1.c3-00045-M8996FAAAANAZM-1.145041.1.149166.1
8/19/2018 2:03:53 AM: IMEI: 3522270xxx4445-2
8/19/2018 2:03:53 AM: BlueTooth Address: 00:00:00:00:00:00
8/19/2018 2:03:53 AM: Phone Code:
8/19/2018 2:03:53 AM: Elapsed: 1 secs. --> (v9.52)
8/19/2018 2:03:53 AM:
8/19/2018 2:03:53 AM: Checking Login and Password...
8/19/2018 2:03:55 AM: OK
8/19/2018 2:03:55 AM: Ballance:
8/19/2018 2:03:55 AM: 30 crd.
8/19/2018 2:05:06 AM: You have 30 credit(s) left. This operation takes 10 credits.Continue?
8/19/2018 2:05:06 AM: Yes
8/19/2018 2:05:08 AM: Searching modem interface...
8/19/2018 2:05:08 AM: found COM7
8/19/2018 2:05:09 AM: Reading data from phone...
8/19/2018 2:05:09 AM: OK
8/19/2018 2:05:09 AM: IMEI: 3522270xxx44452
8/19/2018 2:05:09 AM: Checking root rights...
8/19/2018 2:05:10 AM: OK
8/19/2018 2:05:14 AM: Writing zTool...
8/19/2018 2:05:14 AM: OK
8/19/2018 2:05:14 AM: SW Version: H91810u
8/19/2018 2:05:14 AM: Initialization zTool... (this can take 1-2 minutes)
8/19/2018 2:05:48 AM: OK
8/19/2018 2:05:48 AM: Reading data from phone...
8/19/2018 2:06:15 AM: OK
8/19/2018 2:06:15 AM: Calculating...
8/19/2018 2:06:16 AM: OK
8/19/2018 2:06:16 AM: Searching server...
8/19/2018 2:07:21 AM: OK
8/19/2018 2:07:21 AM: Waiting for server answer...
8/19/2018 2:07:23 AM: OK
8/19/2018 2:07:23 AM: Initialization zTool... (this can take 1-2 minutes)
8/19/2018 2:07:24 AM: OK
8/19/2018 2:07:24 AM: Reading data from phone...
8/19/2018 2:07:28 AM: OK
8/19/2018 2:07:28 AM: Unlocking done
8/19/2018 2:07:28 AM: Elapsed: 142 secs. --> (v9.52)
8/19/2018 2:07:28 AM: