Hi siege
I am only the messenger in all this.
MaMa's original fix did not work for me but this workaround fix did.
The Wolves Of Steel & OHII Single Player Campaign Progress – Workaround By vdr1981
Logically I would assume you do not need to fix anything until you at the start of a gaming session where you are likely to be changing campaigns.
Those using the tonnage bar would need it active all the time.
I am sure MaMa or Vecko will be able to give you the information you want.
Peter