Updates not appearing in "Update manager"

Hi there,

For some reason, I receive emails from Monit saying there are updates available, but even after forcing using "check" button, no updates appear.

Any idea how to solve that? (I guess the update is there but stays hidden somewhat.

Many thanks in advance,

Very strange: it seems resolved.

I just added a plugin and after that i came back to the "Update Manager" and there were the updates that should have been...

No explanation from my side.

Thanks a lot, your link to the key update fixes the thing definitively.
Tugdual