I'm running the bed that came with my Ender 3 pro (using a pei sheet, this is repeatable with glass too), been having this issue for a while I think. Is it time to replace the bed?
Update: Figured it out, what my bl touch was attached to was very loose, and was going up on the far side of the x gantry. and it's now fine.
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Put something flat on your bed. It should have a noticeable gap between the bed and the piece
Or you have something wrong with the level sensor
I just put a metal ruler across it, and there's a noticeable gap
This to me looks like it's time to buy a new bed, stick with Creality or is there a better brand to upgrade to?
I'd get a good tempered glass sheet, creality sells good ones cheap. it'll go right on top of this. You might use a bit of thermal paste to seal those gaps and make sure it heats evenly. One side of the glass will be textured, I prefer the smooth side.