It looks like https://forums.ubports.com/topic/7789/note-on-the-last-rc-volla-update-june-3/12

@tobsend
there is a similar problem with the Xperia X. Randomly losing Wifi. I thought I should mention this, perhaps the problems are related.

@tobsend Not currently. Would be a useful feature

@TobsEnd I had similar issue with FP2 some time ago. Couldn't figure why, happened after update, persisted after channel change (stable, rc) and next OTA updates didn't fix the video playback. I couldn't play videos for several months.

The video issues were fixed after complete UBports reinstall (with wipe) using the installer.

I hope it will fix your issues too.