Some messages are skipped when receiving

• I have searched open and closed issues for duplicates
• I am submitting a bug report for existing functionality that does not work as intended
• I have read https://github.com/signalapp/Signal-Android/wiki/Submitting-useful-bug-reports
• This isn't a feature request or a discussion topic

Bug description

When I get numerous texts, usually I don't receive the last text. Let's say I receive x number of texts start from time n, n+1, n+2, ..., n+x. What happens is I usually don't get the xth text at n+x time.

And when I send a text, say at n+x+100 time, I receive that last xth text at n+x+100 time instead of receiving at n+x time.

Steps to reproduce

• It's random

Actual result: I receive the xth text at n+x+100 time, that is the time when I send a text.
Expected result: I should've received the xth text at n+x time.

Device info

Device: Xiaomi Redmi Note 5 Pro
Android version: Android 11, LineageOS 18.1
Signal version: 6.20.5

Link to debug log

https://debuglogs.org/android/6.20.5/429932bf27bae6559ea01019ee8d4aade717b0a6696f60bddf0fed2b6c3e057a

Start by reviewing the linked debug log and the reported random reproduction steps for Signal 6.20.5 on Android 11. Investigate why the final message in a sequence is delayed until another message is sent; done means messages arrive at their delivery time rather than being released by a later send.