MK4S and TPU malfunctions

I keep getting fake collision detection whenever I load 90A TPU and start a print, the printer self calibrate itself for like 10 minutes before it actually starts printing, I just have to keep pressing RETRY twice and OK until it goes. I have none of this when I load PLA and PETG.

I also slightly unscrewed the idler screws.. is that the problem?

I bought this printer used (less than 100 hours) and it prints perfectly except those error I keep having with TPU.. I read online and haven't found a solution yet! Anybody knows what's going on? Reddit is my last hope.

I wish I had my MK3S back, it was so much less hassle to print...