Steam client version (build number or date): Feb 11, 2020
Distribution (e.g. Ubuntu): Ubuntu
Opted into Steam client beta?: [Yes/No] No
Have you checked for system updates?: [Yes/No] Yes
Please describe your issue in as much detail as possible:
command line arguments are ignored after issuing %command% for non-steam games such as those from the Epic Store.
-EpicPortal works fine on its own, but perhaps I want PROTON_LOG=1 or MANGO_HUD=1
Your system information
Please describe your issue in as much detail as possible:
command line arguments are ignored after issuing %command% for non-steam games such as those from the Epic Store.
-EpicPortal works fine on its own, but perhaps I want PROTON_LOG=1 or MANGO_HUD=1
Steps for reproducing this issue: