.dropConnection callback is fired to early

[AMooshofer]

I got an issue when terminating the connection to a plc.
After calling .dropConnection i get the callback to early, when looking at the log without silent mode you can see the callback is called, before it terminates the connection.
When i wanna build a new connection afterwards i get all kinds of different errors.
I found a way around this issue: when calling .connectionCleanup in the callback it terminates completely and a new connection is possible.