It appears to have worked. Thank you.
KIS has started blocking multiple games as of 2-3 months ago. I first noticed it has been blocking Elden Ring through Steam, failing to allow server login for like 2 months. Since then I've seen two other examples. Fallout 76 through Steam won't login to the Bethesda.net server. Honkai Impact through the PC client fails login. All of these are on my trusted list and I've been hunting for setting or exceptions but nothing changes it and none will behave until I pause KIS.