Hi @gapintheclouds,
After re-reading this thread, I am wondering if you already had these problems before Lineage 17.
I have experienced the same issues as you on Lineage 17 (I think it started on 16 already). Then I did a complete reinstallation from scratch and installed /e/ pie. I haven’t had any troubles for 15 days (some mild dots like @morgenstern’s pictures in the first post, but not as bad). Then I have upgraded to /e/ Q and some of the problems are back. Mainly: the dots appear more often and are often followed by an app freezing. It happens a lot with my news app, so I thought it might be related, but it also happens with Signal.
I upgraded yesterday and I already have had 3 freezes today.
Could it be Android 10 -related? I would guess not, because I think that I experienced issues on Lineage 16, but the problems appearing with my upgrade are quite obvious. Could it be something else related to my upgrade, but not Android-10 related?