Thanks it worked for me with Intel AMT on a HP EliteDesk 800 G4 SFF.
I have set the /etc/default/grub to the following
This is my dmesg | grep tty
root@lab-pve-01:~# dmesg | grep tty
[ 0.000000] Command line: BOOT_IMAGE=/vmlinuz-6.8.12-4-pve root=ZFS=/ROOT/pve-1 ro...
Hi I am a little late but I found a solution for my (similar) problem:
I enabled "Disable Chunked Encoding" under Cloudflare Zero Trust > Access > Tunnels > (my tunnel) > Public hostnames > (hostname for pve) > Additional Application Settings > HTTP Settings > Disable Chunked Encoding
I hope...