Try removing
remove it shuld be there but isen't working for me in unraid 6.8.3
<hyperv>
<relaxed state='on'/>
<vapic state='on'/>
<spinlocks state='on' retries='8191'/>
<vendor_id state='on' value='none'/>
</hyperv>
and sett hypervclock to 'no'
<timer name='hypervclock' present='no'/>
works for me don't know way