Same random reboot issue with 8.5.2 build 5581 on Balance 20X. 7 times in the past two weeks. Looking forward to some more announcement from Peplink about this issue.
I do see [Known Issue] [8.5.2] Balance 20X - Unexpected Crash - Announcements - Peplink Community with a bit of information, but pretty minimal and it was not clear to me if the mentioned affected version 8.5.2s026, 8.5.2s042, or 8.5.2s051 are the same as the 8.5.2 build 5581 I experience this reboot issue with.