Steam Flatpak sometimes crashes during game download

I use Debian 12.1.0 with Gnome 43.6 on Wayland.
Flatpak version 1.14.4.

The error codes are:

src/common/pipes.cpp (883) : fatal stalled cross-thread pipe.

src/common/pipes.cpp (883) : Fatal assert; application exiting.

It causes my Steam window to stop responding and then the whole Gnome Wayland session freezes, so I can only hard reboot.

I was previously using Steam Flatpak on Fedora and didn't experience this issue. Can it be caused by the specific distro? Or is it because of the big Steam client update? (Haven't used Steam for some time).

Start by reviewing src/common/pipes.cpp at the reported line and reproduce a game download on Debian 12.1 with GNOME 43.6, Wayland, and Flatpak 1.14.4. Done would mean identifying a reproducible cause or a confirmed fix for the stalled cross-thread pipe crash and session freeze.

Written by the indexing model from the issue text.