Double api connection Node-red

Nora node-red had a disconnect and in the log I suddenly had a double api connection.
deleted everything in node red, google home and revoked the token.
all steps were reset, yet the message duplicate API connection persisted.
searched the internet for a solution.
then it turned out that if you put nora in a group, everything should work.
this is partly correct, it works again but all components are duplicated.
also cannot remove it in the home app and the https://node-red-google-home.herokuapp.com website.
so I think the connection is still open.
what should I do about this

my system is docker on linux