I managed to fix this by changing the version of the MetaHuman Creator and accessing those MetaHumans from there. I was working in 5.2 and 5.3 for different projects, just launched 5.4 version of MHC, deleted the ones with silhouette which were causing problems from My MetaHumans section.
I believe it will work the other way around from 5.4 to 5.3 or 5.2. It was also causing my Bridge to render empty tab whenever I want to access my MH library, after deletion everything came back to normal functionality.