Hi Paul
I seem to be getting the same problem. It is fine and fixes the issue when you purge manually but then when I check hours later all the styles are missing and can’t find the css file reference.
I have set it to inline everything at the moment so there is no css file to include but am now worried about the JavaScript merged files.
Will check later on as see if it happens again.
FVM was installed via the porto theme optimise setup along with the stackCache plugin.
Regards
Andy