Samsung's galaxy wearable app on Android randomly resets itself and remove all paired devices like galaxy watch 4/5 and galaxy buds etc. This happened 4 times in 9 months and there is no way to recover/re-pair devices without resetting. This is a serious issue.. There must be a way to recover/re-pair galaxy wearables in app. This looks like a software problem on galaxy wearable app itself. There are many complaints about this problem but no fix provided yet. Come on Samsung, improve your wearable app and fix this issue asap..
Using a galaxy phone yet had this problem couple times. If you google like "galaxy watch 4 unpair lost pair" you can see many related posts out there.. I think worse thing is that this problem related to wearable app so galaxy buds and others affected when this occur.