In the meantime the issue is solved. After opening up a support case the engineer found two things to modify.
First:
What I did in lab was to open the registry to
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Apache Software Foundation\Procrun 2.0\NA_WFA_SRV\Parameters\Java
And changed the “option” key with new values for XMS and XMX like in :
-Xms1536m
-Xmx3072m
Once this was done I restarted the application and the execution status window was updated in a instant.
This didn't help at once.
Second:
We changed a my.ini file of MySQL at c:\programdata\Mysql\data\my.ini
In that file we have
Innodb_buffer_pool_size = 8M
We changed the buffer poolsize to 2048M and restarted the services, right after WFA was started we could see that the windows are updated faster than they were before.
That did the trick