Black screen in The House in Fata Morgana when using Nvidia GPU

**Game information**
Running [The House in Fata Morgan](https://store.steampowered.com/app/303310/The_House_in_Fata_Morgana/) using Proton Experimental using discrete Nvidia GPU.

**Distribution name and version where applicable**
1. Distribution: Fedora Silverblue 37
2. DE: Gnome 43.2

**Flatpak info**
1. flatpak --version:
```
Flatpak 1.14.1
```
2. flatpak --gl-drivers
```
nvidia-525-60-11
default
host
```

**Problem description**
The game shows only a black screen when steam is launched using discrete graphics. I can hear the audio just fine. It runs fine with integrated AMD graphics.

Note: There are games like [Sabbat of the Witch](https://store.steampowered.com/app/888790/Sabbat_of_the_Witch/) which run fine with Nvidia + Proton, so it doesn't seem to be a general Nvidia + Proton issue as I initially imagined

**Does this issue reproduce with native Steam**
Have not tested