You guys have the Oculus plugin enabled in your project btw, so it opens Oculus home on launch despite not being a VR game. Might want to disable it via Project Settings > Plugins.
Just checked your game files and you have openxr:
\\Engine\Binaries\ThirdParty\OpenXR\win64\openxr_loader.dll
*Yep, it's that, just tested and deleting the OpenXR dll fixes the issue. Can't see any immediate issues so presume it's not being used, pretty sure that library is specifically VR/AR related too.