I'm not sure if this is a Heroic issue, a proton issue, or SteamOS issue, but I wanted to present it here. I tried to run some of the games I have from either Epic, Amazon or GOG and it either crashes with no notification or will get different notifications.
I tried Golf With Your Friends and it doesn't start up where prior to the update it did. I got a "fatal error" notification for Ender Lilies from Epic. I got a more specific "A DED11- Compatible GPU (feature level 11.0, shader model 5.0) is required to run the engine. " trying to run Afterimage. All games are using GE Proton latest, and all worked prior to the Steam OS update. Please let me know if I'm in the right area for those errors. Thank you.