That is also my thinking. It always get stuck in the same place during loading.
Main part cfg: https://github.com/KSP-RO/SovietRockets/blob/2fe8c6631f6d8ee6d3374e4ce8a93117c2829392/GameData/RN_R7/master/blockl.cfg
but RO make changes too - https://github.com/KSP-RO/RealismOverhaul/blob/master/GameData/RealismOverhaul/RO_SuggestedMods/RaiderNick/RO_RN_R-7%20Tanks.cfg
I think Real Plume also add some small change but I cannot find it at the moment. I will check when I get home and add relevant CFGs if needed.
EDIT - Real plume cfg: https://github.com/KSP-RO/RealismOverhaul/blob/d3509c468ae89ced4436e458c40be4ee2fb9904d/GameData/RealismOverhaul/RealPlume_Configs/RaiderNick/R7/molniya_blockl.cfg