Advice or Suggestions on repair  

Advice or Suggestions on repair

Hi. Have this weird issue with Prusa XL 5 Tool w/enclosure

I mostly print from the center of the bed. The last few prints I printed toward the rear of the print bed. I noticed alot of debris on the right side. 

Then it failed to park the Toolhead 3. 

I thought it might need calibration. Y calibration was fine. On x-axis calibration, this weird shaking thing happened.

A T10 also fell out from somewhere and landed beneath the print bed. I've been looking around for any missing screws and aven't noticed any. Then I noticed the belt was frayed. 

Probably need to replace the belt. But would anyone have any ideas or suggestions on what should be my next steps to fix this?

I contaced Prusa support but they haven't gotten back to me yet. Probably need to replace that belt. But I am not sure why this is happening. 

I also noticed that the tool holder feels like it "jumps" when moving in the x direction at certain spots (180mm - 360mm range). When this jumping/skipping occurs, the tool holder has the tendency to want to move back or forward in the y direction. 

Any help would be much appreciated.
Prusa XL 5T with Enclosure
Firmware 6.2.5

Printer is about 3 months old. 

Thanks in advance for any help.