Tiktok Pro algorithm seems to push me of the app

So I'm from Germany and therefore downloaded the Tiktok Pro App. Not having all those Tiktok Shop ads and the shop itself is really nice but I've noticed a few things: 1st ads aren't properly marked (which is illegal in Germany btw) And 2nd the algorithm is really weird. I noticed that I only get Videos I like for around 20 minutes until it shoves uninteresting stuff I never cared about in my face. After around 3 hours (I didn't time it) it only plays irrelevant stuff. It feels really weird because yes this actively reduces my screen time on the app and generally it's a good thing but it's just so off putting? Has anyone else noticed a shift since installing TikTok Pro?