Doorbell disconnects frequently and only way to reconnect is to pull battery

Hi,I have a ring 3 doorbell and have it installed on the door as no room on the frame. It is connected to a chime Pro that is about six feet away.The doorbell has started to disconnect on a regular basis and won't reconnect by going into setup mode. I have found that after a quick battery pull it reconnects straight away.It is possibly caused by the door slamming but was fine for the first 3 weeks of installation.Anyone come across this before and have any suggestions to stop it happening. Moving the doorbell off the door isn't currently an option.Thanks