A missed post is the last thing you notice: the channel simply has nothing in it, and unless you are watching you find out a day later. There are few causes and they check in order.
No rights
The most common. The working account was removed from administrators, or its permissions were trimmed. This has to be checked when the post is queued, not when it fires: finding out three days later at nine in the morning means losing the post.
On the arrangement — granting rights to a working account.
The account is restricted
If the account picked up a flood wait, publishing is deferred. The sign is silence across every channel rather than one — what to do.
Too late
If the queue stood still for half a day, some posts are past publishing: a morning post in the evening looks odd, and a date-tied one is pointless. Sensible behaviour is to skip those and leave a record.
Double posting
The opposite trouble: the post went out twice. That happens when the connection dropped after sending and the system, believing it failed, tried again. Which is why publication is marked done before sending rather than after: a missed post is noticed by the owner, a duplicate by every subscriber.
What to check first
- The working account's rights in the channel.
- Whether the account is restricted.
- Whether the queue is empty — the post may have been published and deleted.
How Neurogram does this
Everything above is manual work that runs into the number of hours in a day. Neurogram does it on your own accounts and without you: it collects channels and audiences, writes comments and replies with a language model, and keeps limits and quiet hours so the accounts survive. See pricing or look at your case.