So, it seems like the WebOS update messes up the Ace Stream casting.
If your android phone is Samsung (mine is S9+), you can use the built-in Smart View's Screen Mirror function to connect to the tv and then play the Ace Stream content on the phone. The good thing about it is you can still use other apps on your phone and they won't show up on your tv, just the Ace Stream content. I am not sure non-Samsung Android phones can do the same though.
Hopefully, another WebOS update will fix the problem.
