MangoHud stopped working with latest Flatpak update

With the latest Heroic update (2.15.2 Hotfix #2, Flatpak) games no longer launch if MangoHud is enabled. Heroic reports Mangohud is enabled, but 'mangohud' executable could not be found on $PATH. I have confirmed I have org.freedesktop.Platform.VulkanLayer.MangoHud installed (branch 24.08), but Heroic doesn't seem to be able to access it at all, while Bottles (on the same 24.08 branch) can.

Heroic:
$ flatpak run --command=bash com.heroicgameslauncher.hgl
$ which mangohud
which: no mangohud in (/app/bin:/app/utils/bin:/usr/bin:/usr/lib/extensions/vulkan/MangoHud/bin:/usr/lib/extensions/vulkan/gamescope/bin:/usr/lib/extensions/vulkan/OBSVkCapture/bin:/app/bin/heroic/resources/app.asar.unpacked/build/bin/linux)


Bottles:
$ flatpak run --command=bash com.usebottles.bottles
$ which mangohud
/usr/lib/extensions/vulkan/MangoHud/bin/mangohud


Is there a bug with the latest Heroic release then?
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