[iPXE 2.0.0 regression] PXE boot fails on Lenovo T480 and other laptops since 1.0.35

[matmus06]

Hello,
Here is a screenshot from an HP ProBook 360 11 G1 (the same problem occurs on Lenovo T480 and others) :

The client gets stuck at "Preparing for boot, please wait..."
Additional information:

Works perfectly with 1.0.34
Fails on 1.0.35 / 1.0.36 / 1.0.37 (stuck during iPXE loading)
On 1.0.37 the auto-install (.XML) works only on machines that manage to boot successfully into iVentoy.
It seems to depend on the laptop model and BIOS version (sometimes it works, sometimes not).

I already tried:

Different EFI loaders (snponly.efi, ipxe.efi…)
Lower menu resolution
Secure Boot disabled
External DHCP mode

Thank you!