Plex on iPhone - Screen Darkens Intermittently

Server Version#:1.43.2.10687
Player Version#:2026.110.0
Hi all. Mildly annoying issue here. Whenever I am watching Plex on my iPhone, the screen will darken, sometimes totally black, for several seconds, and then return to normal.

I’ve researched a bit but cannot find a fix. I did turn off the true tone setting on my phone.

Any ideas? Thanks in advance.