After Upgrade 2.1 Missing monitoring data for plugins

CMK version: Checkmk Managed Services Edition 2.1.0p2
OS version: Ubuntu 20.04. Agent: Windows Server 2012R2 / 2016 / 2019

After Upgrade to 2.1 we got a lot of missing monitoring data. Mostly wmi_webservice and dotnet_clrmemory. The check is constantly flapping.

Error message:
[agent] Success, Missing monitoring data for plugins: wmi_webservices WARN, execution time 3.8 sec
[agent] Success, Missing monitoring data for plugins: dotnet_clrmemory WARN, execution time 2.4 sec

Sombody with similiar observings? Or an idea, why this is happens?

Kind regards
Marcel

I have the same problem with Missing monitoring data for plugins: dotnet_clrmemory but only occasionally. The newest agent is installed.

Dou you have an answer to solve that flapping status? I have some hosts with

[agent] Success, Missing monitoring data for plugins: dotnet_clrmemoryWARN , execution time 9.2 sec

No, unfortunately no progress. I think, i will disable the check.