ok, then first I will flash the sept 1 firmware and then report to you if it is working or not !!
Ensure it's the whole 1GB firmware/2GB firmware when extracted, and that it's NPJS25.93-14-10.
Bear in mind that from your other posts, you flashed the December GPT, was that from the December 2017 security patch OTA?
If so, then as we've mentioned in the other thread, I wouldn't recommend re-locking your bootloader. Though the Sept 2017 firmware is the correct patch level for the bootloader on your device (B1:06 for June/Sept 2017 stock ROMs - you can only re-lock with firmware of the same/newer patch level as your bootloader), because the GPT is newer (from the Dec 2017 OTA), then your bootloader might detect mismatches in the patch levels of your GPT versus the bootloader versus your system patch. With a locked bootloader, that detection is strictly enforced and the mismatch may cause your device to not boot, and unless you could unlock your bootloader again, would likely mean a very expensive motherboard replacement.
In other words, best to wait for the NPJS25.93-14-13 stock ROM to be leaked to even think about re-locking your bootloader. Ah, the mess that comes from downgrading stock firmware...
Oh, one more thing, does this behaviour occur with other charging cables?