Try clearing cache. Open beamNG launcher, click support tools, and then click clear cache. If that doesn't work, try disabling mods or running in safe mode. Beamng launcher, support tools, safe mode.
I cleared my cache, I deleted all of my mods yet the bug is still present. By the way this bug only started happening after the latest update. Not sure if that has something to do with it?
Try a clean reinstall. Uninstall the game from steam, then delete the BeamNG.Drive folder under documents.