Critical Description
In some situations where an exception could be raised inside a component like c:forEach, and on the same time fcc.startComponentUniqueIdSection(...) and fcc.endComponentUniqueIdSection(...) are used, the section is not closed, affecting theoretically the ids generated.
The probability of something like this is very low, but as a good practice it would be better to ensure fcc.startComponentUniqueIdSection(...) and fcc.endComponentUniqueIdSection(...) are called inside a try
{...}finally block.