Updated to 2020.03.14.1915 and did a “rescan all” on YTTV. Channel count dropped to 96 from 111. FS1 and FS2 are definitely gone now:
2020/03/16 19:49:33.414462 [TVE] Channel scan 126/199 FS1 failed: notAuthorized 2020/03/16 19:49:33.643619 [TVE] Channel scan 127/199 FS2 failed: notAuthorized
If I log into foxsportsgo.com and log in with my credentials, both channels show as available. On iOS if I try to play them it takes me to the App Store. From a PC I am able to play the channel through a browser. Maybe there is still an issue here?