Worms WMD has low framerate and cracking sound

**Game information**

Worms WMD, Steam (APPID 327030), linux native version.

**Distribution name and version where applicable**

```
NAME="Arch Linux"
PRETTY_NAME="Arch Linux"
ID=arch
BUILD_ID=rolling
ANSI_COLOR="0;36"
HOME_URL="https://www.archlinux.org/"
DOCUMENTATION_URL="https://wiki.archlinux.org/"
SUPPORT_URL="https://bbs.archlinux.org/"
BUG_REPORT_URL="https://bugs.archlinux.org/"
LOGO=archlinux
```
**Flatpak info**

```
latpak --version
Flatpak 1.5.0
flatpak --gl-drivers
nvidia-435-21
default
host
```
**Problem description**

When game is started, intro videos are played normally but after loading main menu has a very low framerate and game plays cracking sound, same problem in loaded game levels.

Game spams terminal with the same error messages
```
dbus[1057]: arguments to dbus_connection_unref() were incorrect, assertion "connection->generation == _dbus_current_generation" failed in file ../../dbus/dbus-connection.c line 2823.
This is normally a bug in some application using the D-Bus library.
```
I've played this game before i switched from openSUSE Tumbleweed and it had no such problems.

**Does this issue reproduce with native Steam**

Have not tested.