Please note that Thunderbird is not an iCalendar validator. However, I don’t see any problem with this iCalendar event here, it looks like this on my Android 8.1 emulator (25 Nov 2016 10:30 +00 = 25 Nov 2016 11:30 CET, which is used in the calendar view):
0_1526289516103_Screenshot_1526289471.png
Also, which past time event limit have you set in the account? This information is also contained in the debug info, so please provide the debug info as described in [READ BEFORE POSTING] What’s required to diagnose a problem.