I keep getting the game pass pop up.

Sir i am getting this pop up to buy game pass in warzone

Also keep an eye on the Games With Gold titles as there may be some pop up that you have on disc, I've found that there have been a few games pop up there that I have owned on disc and redeemed, and now I dont' need to insert those discs to play those
games, and check out game pass as well.

This sometimes happens to me too but its not happenening all the time so my guess is its a glitch. I guess you could try changing the friendship then change it back to see if that helps.

Try going to the notifications tab under your settings and resetting them or changing how the notification comes in. You can choose to not show that banner to remedy that.

Check your notification settings and readjust them to the way you want them to be displayed. Change them around a couple of times, then to your preferred notification settings to get them to sync again.