I had the issue as well but I managed to fix it by I changing my boot parameters (exact change differs per bootloader and hardware). Now I happily boot with .15

I had the issue as well but I managed to fix it by I changing my boot parameters (exact change differs per bootloader and hardware). Now I happily boot with .15 series (up from .13). I expect some more users of Proxmox given Broadcom taking over VMware (e.g. I'd like to merge away from ESXi to Proxmox as I don't trust Broadcom). Hopefully it does the product and community well.