Is there any limitation to "count" meta-argument?

Difficulty: unrated

Answer

count isn't supported within an inline block
It's quite limited when it comes to lists.You'll notice that modifying items in lists or even operations like removal sometimes interpreted in a way you didn't expect. For example, removing an item from a list, may shift other items to a new position and since each position represents a resource with count, that may lead to a result where wrong resources are being modified and removed. There are ways to do deal it, but still using count with lists is not always straightforward