I moved a multi-site configuration from one server to another. The sites are all working well accept that on of the sites keeps needing the cache to be cleared. Multiple times per day we have issues with CSS not showing correctly and the admin tool bar disappearing. When we clear the cache it all comes back. We only have this problem on one of the sites in the multi-site configuration .
We have gone through lots of diagnostic steps to try and figure out what is going on and cannot tie the cache needing to be cleared to anything specific. For example it does not coincide with cron running. We have tried turning off caching option (/admin/config/development/performance).
Any suggestion on what to check or what could be going on is greatly appreciated.
Thanks, Steve