Servers stuck on PXE boot

Hello, I have several devices on my cluster that are stuck on a PXE boot loop. We currently run a cluster with one region controller and four rack controllers. Some work just fine, but some fail to PXE boot.

We’ve been unable to debug this and re-checked settings several times.

rackd.log: https://gist.github.com/ebsalberto/283c04a29cd5466030ee27b51c51fd12
regiond.log: https://gist.github.com/ebsalberto/65b6024d9ee3e6ff43addca9f3573fc6

Tried getting the logs from /var/log/maas/rsyslog/186S025502NODE1 but there are no recent logs from that device, which is weird.

Thanks.

I have some servers that will not pxe boot the default bionic kernel. I start with a HWE kernel and switch during phase 1.

TPM can block booting also.

Just 2 ideas