Enough free space, yet get stopped by bitlocker screen

I have 1TB drive.

I have a Windows bitlocker install.

I have pre-shrinked it to 350GB in Windows.

I have 682GB Free space that I used to be able to install into.

With ubuntu-desktop-installer, upon selecting "Install Ubuntu 23.10 alongisde windows", I am presented with the bootlocker QR code warning screen that I cannot bypass.

Ideally i wished to automatically install into the free space, without doing resize from Ubuntu installer. It used to be possible to complete this, whilst a bitlocker partition is there, and there is enough free disk space.

I used manual partitioning to select free space for mantic; and to set existing ESP for EFI, and start the installation.