When Asset CleanUp plugin is enable with WP Rocket, notice to clear cache remains and cache is not cleared at all.
Related discussion and test: https://wp-media.slack.com/archives/C08N8J6VC/p1562328905196400
Related ticket: https://secure.helpscout.net/conversation/877578432/#thread-2503174607
Asset CleanUp 1.3.3.2 update includes "Bug Fix: Sometimes, WP Rocket caching was not fully cleared because of an Asset CleanUp hook that interfered with it". Needs testing again.
I tested this with 1.3.3.2 and the issue seems to have been fixed at their end - https://jmp.sh/CozKBLg
I tested 1.3.3.2 over the weekend as well and found the cache was cleared properly (verified via FTP) and the notice was no longer present on the page.
It's fixed for my client too with the update
Thanks @mifrero and everyone. So we can close this :)