My name is Ran Kopelman and I’m a group manager in Check Point R&D, responsible for the management server’s quality.
It seems that you are facing a known issue that was fixed in R81.10 as part of a big architecture change we made.
Our official recommendation is to upgrade to R81.10.
R81.10 brings a major improvement in operational security efficiency across the management server's reliability, performance, and scale.
In order to quickly solve the issue on your current R80.40 version, please follow sk168334 (Rebuild CPM Solr).
If for some reason the issue still exists following sk168334, please contact TAC and email me.