I am pretty sure the issue is due to more than one docker image running at a time and trying to connect to roon with a duplicate extension token.
How are you using the extension - from docker direct? If so what is the run command line instruction (do you use restart unless stopped) you use and what happens when you look at the docker containers that are running.
Also I think you are using a Synology NAS if I remember , there are some reports of the memory being eaten up over time:
Memory usage on Synology NAS you have runing when this occurs.