Said VM does start with 32, 64, 96 GB vRAM but not with 128GB or higher. Here is the output that I'm getting:
TASK ERROR: start failed: command '/usr/bin/kvm -id 100 -chardev 'socket,id=qmp,path=/var/run/qemu-server/100.qmp,server,nowait' -mon 'chardev=qmp,mode=control' -vnc...