@pdonias Yes, I was running a newer version than that but just to make sure I upgraded to 8068b83ffe58e6caed0cac5816ac2690479a9c41. Still the same problem, unfortunately.
I'm not too sure if it matters, but there are VMs running in the pool that does not have an IP in a "smaller" /24 prefix. So if the prefixes 192.168.0.0/16 and 192.168.100.0/24 are in Netbox, there might be VMs using IPs other than the ones in the 192.168.100.0/24 prefix.