I have been having the same / similar problem:
Device: MacBook Pro(Apple M1 Max)
OS: macOS Tahoe 26.5.2
Memory: 64 GB
StreamFab Version: 7.0.3.8 (Apple Silicon version / StreamFab_Mac_M1)
Same symptoms - icon appears in Dock with the ‘open’ indicator (dot below icon). But clicking on the icon does not open the app window. However, something I stumbled across was that I minimized all of my other open apps and there was the SF app! I could interact with it, but as soon as I tried to change functions/pages (i.e. Home Screen to Downloads tab), my Chrome web browser popped back up with my open tabs. Nothing about / for SF. If I minimize Chrome window again, I see the SF app but any attempt to do anything in the app causes my Chrome browser to reappear and cover the SF app window.
Is the SF internal browser a Chrome implementation? Is there a setting that I can check/edit/disable that might be causing this?
I have deleted the SF app in the Applications folder and reinstalled with the same symptoms but have not performed a full and thorough uninstall of SF and was hoping to find another fix before doing that.
TIA