still having lots of out-of-sync moments, even with the latest version and the fixes in this thread (delete config, delete cache, reinstall in other folder (with other data directory)). Hurts my minting..
It's only a display issue, it won't affect your minting. If when you hover your mouse over it, it says "last generated block time is 1-2 minutes ago", then you don't have to do anything to fix it, you're already synced.
Client doesn't try to sync with a rogue peer when it finds out peer's chain is invalid (also bans the peer's IP for 24 hours). Just the displayed number of left blocks is not updated after the peer is banned.