Server wants to send publish answer but no publish request is available

[MasterBoyd]

Issue:

• When a client creates a subscription to my server, deletes it, waits ~60 seconds, and tries to create it again, the server gets stuck in an infinite loop of trying to publish an answer.
• If the client immediately tries to create the subscription again or within ~60 seconds, its able to without issue.
• Is there some advice of what could be going wrong here?

Server Console:
Monitored Item
Node NodeId(Identifier=UUID('000103e9-3001-0001-0000-000000000000'), NamespaceIndex=2, NodeIdType=<NodeIdType.Guid: 4>) was created
INFO:asyncua.server.uaprocessor:Server wants to send publish answer but no publish request is available,enqueuing publish results callback, length of queue is 1
INFO:asyncua.server.uaprocessor:Server wants to send publish answer but no publish request is available,enqueuing publish results callback, length of queue is 1
INFO:asyncua.server.uaprocessor:Server wants to send publish answer but no publish request is available,enqueuing publish results callback, length of queue is 1
INFO:asyncua.server.uaprocessor:Server wants to send publish answer but no publish request is available,enqueuing publish results callback, length of queue is 1
...
continues until I kill the server....

[AndreasHeine]

what is the client?

edit:
some general infos on subscriptions
https://www.linkedin.com/pulse/brief-introduction-opc-ua-subscriptions-andreas-heine-3pc6e/