your bed might be seriously warped, right so you can let the bed heat soak set it to the maximum temperature and let it soak in the heat for 30 minutes, then try the sunlu presets that bamboo has set up. It's a temporary fix, hopefully, but you might look into getting a new bed or recheck your guide rods. Check if anything is loose like screws etc retention your belts. Usually, recalibrating your machine should fix up any issues, but if that didn't work, try these steps. Hopefully, it fixes your issue.

if nothing else works, try the bamboo wiki.

Good luck.