After every match do I seriously need to be reminded that I can recruit Jean Grey? I assume this must be a bug because no one could ever intend this.
you may need to clear the game cache and restart your device, i only get it once, when i open the game.
If you are on steam, that may be a different issue.
I get it every time after turning my phone screen off. If I’m in a match, the popup appears after the match. Otherwise, it appears as soon as I’m out of the match setup screens.