Well, stable FCOM+ game and so on, reinstalled and tested yesterday everything, started my last save after proper one-by-one activating.
HGEC EVE installed with EVE for FCOM stock replacer.
Robert male Body v5 installed and merged as should be. Proper Clothes and Armor stock replacers installed for all FCOM units (Fran, OOO, MMM, Arma, Artifacts)

Today in one cave fought Putrid Hand mages, all male and female robes were visible and OK.

Later entered Ayleid Ruin with Putrid Hand again, the robe of Putrid Hand is invisible on male NPCs.

Form ID Finder says the following: These Meshes are not found at: Meshes/ My OOO/ Putrid Hand/ Robe M.nif.

Am I wrong or folder My OOO should NOT exist in Meshes folder at all? What is going on?

And what should I do? New istall?
Body Replacer reinstall?

Check what's up with TES4Edit?

Check the "General" tab for the Robert OOO replacer too.