Loaded up the Ubisoft app recently. Pure trash, apps / syncing wouldn’t work till I accepted all cookies, things wouldn’t download in the background while playing single player, etc.
I tried playing an old Ubisoft title recently, Farcry Blood Dragon. But it wants to connect to a long dead ubisoft server EVERY time I his Esc to go to the menu and takes 30 seconds to time out. Every time! I decided I just won't buy anymore Ubisoft games after that.
Fwiw I played that for a few hours, I got it via their monthly subscription. I did not have the issue you describe.