In my multisite WP install with 250+ sites, the Sites list is starting to act really weird after site with ID 297 was added. Every site added since then is not showing up on the list when it is first loaded. If I click one of the sorting options (i.e. Path, Last Updated, Registered) the missing sites show up again.
This is not the biggest problem ever, but still annoying all the same.
I haven´t installed any new plugins or otherwise messed with site settings for a while now.
Any ideas on a possible course or solution?