Summary
When you configure the Feed/Hook filter, you define which order updates should be displayed in the feed. Two types of filters can be used in the feed: FromWorkflow and FromOrders.
Using the FromWorkflow configuration, you can only filter order updates by status. And FromOrders allows you to filter updates in your feed by any property in the order JSON document.
But on FromOrders expression when there is a dynamic property on filter, as status for example, this makes the indexing for Orders skips some order versions. And it can results in no notifications for feed/hook when it should be happened.
Simulation
Set an expression of FromOrders with order status, and many possibilities as sales channel, sequence number and another conditions.
It can be not notified due dynamic info as order status.
Workaround
The recomendation for cases like this, is to remove that part dynamic of the filter and handle this externally. If the dynamic info is the main point as order stauts, they should use the FromWorkflow option.