DiRT 3 Complete Edition crashes while racing

**Game information**
DiRT 3 Complete Edition

**Distribution name and version where applicable**
- OpenSuse Tumbleweed 20240201

**Flatpak info**

- Flatpak 1.15.6
- flatpak --gl-drivers
- default
- host

**Problem description**

The game runs fine until it crashes instantly after racing for a bit.

- Crash log message:

`GLib-GObject-CRITICAL **: 20:13:48.110: g_object_unref: assertion 'G_IS_OBJECT (object)' failed`

[Logdirt3.txt](https://github.com/flathub/com.valvesoftware.Steam/files/14214709/Logdirt3.txt)

**Does this issue reproduce with native Steam**
- ~~Have not tested.~~
- (09/02/24) - Tested. The issue is reproducible on native Steam