Noticed a couple of weeks ago that trailers do not play when I use cinema mode. Initially I thought it was a Emby for Kodi plugin issue as there were so many udates going on at the time. However, I see now that even when i use the web player, the trailers do not play. My custom and codec intros both play fine.
Trailers play fine when accessing the Trailer Channel from the webapp home page.
Running V18.104.22.168 on the offical Emby Docker on Unraid. Monthly Subscriber to Emby Premier.
Settings shown below.