If you're on the mastodon.social server you may have posts missing from your timeline. This is apparently due to technical problems on mastodon.social:
https://status.mastodon.social/cm6i55duu000ijwc2g6f4t3kx
If this is happening to you it's not your fault, it's your server that is currently a bit broken.
Other Mastodon servers are unaffected by this and should be working normally.
(via @ivory)
Edited 7d ago