apple magic mouse slow and lag with imac

hello wveryone! i have a problem with apple maic mouse and imac! os mojave

I have 2 apple magic mouse a1657 that worked perfectly until yesterday with my iMac, while today they are giving me problems: slow, lag, while clicking and scrolling remains ok!

i Tested both of them with a mac pro and they have no problem, they lag only with my iMac!

So I tried another mouse, an Apple magic mouse 1 A1296, with my iMac and worked perfectly!!!

whatt's the problem?

i tried bluetooth debug from terminal... nothing

i tried reset nvram/pram/smc ...nothing changed.

i tried reset mouse... nothing

delete file plist

restore SSD and install new OS mojave ... always the problem.

what should i do?

thank you !!!