Running the Performance Profiling Build it has become impossible to start a SP campaign.
No matter what available content is selected, the game client will load the very first line entry in the Menu-UI for Campaign -> "Reality Check"
This applies to ANY single player campaign, be it by BHI or by 3rd party and includes the MAJOR optional DLCs (Contact, GM)
Bug might be variant of behavior described in 2019 in forum here (for standard build):
https://forums.bohemia.net/forums/topic/223134-problem-with-the-campaign/