Not sure what causes it, but about 7% of the times I try to comment on a post, the app will crash and restart, failing to post the comment. Unless the comment was manually saved, the comment will also be completely gone, forcing you to rewrite the whole comment.

It seems to happen mostly on longer comments when the app have spent some time in the "comment" state. It's possible that leaving the app (not closing it) and reopen the window is part of what triggers the bug.

Android version 9, the bug has been persistent through multiple versions of the app, including the latest version available at the play store.