Agent Lightmass - Processing stop but still running

Hello everyone,

i have a strange issue. I connected my computer to an server to improve the lightmass speed. Now have a look at this:

Both systems don’t show any blue bar for “processing mapping”., BUT both computers have a 99% CPU utilization for lightmass and the mainbar at the bottom is also getting bigger and bigger. What’s happening here? Does anyone know this problem?

Greets .