RegEx Heading h4 above [ dev pls verify the expression ]

[ananthuthilakan]

i am trying heading and answer with only H4 and above heading to be used as question and answer

^####+(.+)\n*((?:\n(?:^[^\n#].{0,2}$|^[^\n#].{3}(?<!<!--).*))+)

Do this expression work without any problem?

upon my testing working GOOD.
Any possible future issue ?