new topic shows last instead of first

[plongeur.com]

Hi, one of my moderators (but i don't know if it is relevant) posted a new topic and for some reason it seems the creation is not taken into account in search and topic list :

it doesn't appear in a search of topic active in the last 24h :




It does not show in the channel list as last active topic :



It shows last in the forum display :





Yet it apears in the "new topics module" :



I guess it would refresh if i post a reply but it would be nice to know what might explain this behaviour.

[Wayne Luke]

Are you using vBulletin 5.3.4?

[plongeur.com]

yes.

As expected i just replied to the discussion and it returned to normal, so no big deal but it is still an odd behaviour.

[Wayne Luke]

What caching systems are you using on your server? Using software such as Varnish or a CDN like Cloudflare can produce this behavior.

[plongeur.com]

i don't have any caching system.