Been this way for over 18 months. Fix this now or remove LFG feature from app until it works.
LFG on companion app can be very spotty some days it works great somedays it doesnt work great, me personally I will have some instances where the people sending me invites will have trouble, then they will send me a message either on my respective platform or through the in app messaging system that is a good alternative to if the app is not working hope this was helpful
Hey there! You will want to delete your app cache by going to Settings > App Settings > Delete Cache as well as Delete Content Database so it refreshes the app. Otherwise, you can do a full uninstall and reinstall of the app.