Guitar going sharp for no reason?

I have a new JP60 which plays great! The bridge is perfectly level with the body of the guitar and floats well and moves in both directions. Generally the tuning is pretty good after doing some whammy bar tricks. But lately I’ve noticed that after tuning the guitar and letting it sit for a few minutes, its just pulling sharp? *especially* on the low E/A/D strings they seem to be much sharper than the higher strings.

Anyone have any ideas on what can alleviate this?

For setup work, the bridge is balanced fine. I put big bends nut sauce on the saddle and a bit in the nut.

Thanks for any help folks!