I had similar problemas with one of the 3 AMD "servers" and it was a hardware problem as some memory does not work well with overclock profile.
I also noticed that GeForce display cards are better supported.
See if you find any "errors" in dmesg and / or syslog.
Thank you @Dominic for the update.
At least for me the way GlusterFS "balance" the nodes is too slow to use it as an online storage.
For VM backup and other backup needs its a good price / security option especially when you consider remote nodes ( geographically distributed nodes ).
Today is a national holiday and I managed to go to the remote site and test WOL again and now its working as expected.
I'm running the latest PVE kernel available ( Linux pve-03 5.0.21-5-pve #1 SMP PVE 5.0.21-10 ).
Mobo is a ASUS PRIME B450M.
BIOS version: 1820 / date: 09/12/2019
Maybe a group of FW rules + IPS can improve antivirus from MS ( and others ).
Security is a journey / methodology and not just a product.
I'm evaluating Windows Defender + IPFire.
I'm going to test the options presented but it will take a week as I can only stop this node on weekends.
Maybe I can change NIC with another brand / model.
Previous NIC ( same model / manufacturer / chipset ) works great with WOL.
The kernel version and motherboard were also different...
I'm having a similar problem with a very common NIC :
Supports Wake-on: pumbg
Previous NIC ( same model / manufacturer ) works great with WOL and with earlier PVE 6.0 kernel version.
As I had a hardware problem, everything was changed, from NIC to...