The TIDAL app is absolute trash, it has this same issue all the time; not just that, but also, if a download fails it just hangs there and does not download the rest of the album/playlist.
Also, why would you want to download things in the first place? To watch them offline, right? Well, guess what happens when you open the app w/o an internet connection ... it asks you to login, so you cannot even access your music. 900k/year TOC genius work there.
The only reason why I haven't canceled is because I'm too lazy to reset my password in order to login and cancel, lol. Might do it soon, though.