Remote fob losing connection

[J1MMCD]

Regularly getting my remotes are losing connection to the car.
This is over 3 separate key fobs at varying times and they won’t trigger the open or close signal to the car.

Had to use the jiggle key to open then it works again almost as if it’s re-syching.

Problem is that the jiggle key seems to be hit and miss when it works, sometimes does absolutely nothing so not sure if there’s a time setting that you can’t use the jiggle key twice within etc but this is becoming a pain.

Thought it was batteries, changed all 3 I have and it worked fine for a couple of days but now it’s at it again.

Any ideas?