linux – Taskhost Process has high CPU when using VirtualBox

I am running a Ubuntu VirtualBox-VM on my Windows 10 host machine.

After the VM is running for some time (not at the beginning), the process taskhostw.exe uses much of the CPU. I normaly use ssh to connect to the VM, but using a GUI is also possible. I am using a shared folder.

When I shutdown the VM, taskhostw.exe goes back to normal. I was using Process Explorer to investigate the problem, it only showed stuff related to Microsoft or my Antivirus Solution.

Any help is appreciated.