@beastman
Speaking of… I saw Plex do that today on my S7 Edge!
It was playing a Tablo file I used SurLaTablo.py to get off the device (since casting is broken) but it only did it while the ui was on top of the video & only flashed green a few times before I hit the cast button. Still thought it was odd tho.
Also, It was one of them rare times I hit play before I hit the cast button. Normally hit the cast button first in Plex.