Steps to reproduce: Try to apply plasma web to ship that is already under plasma web from other ship. It will drain your energy and go into cooldown but dont do any damage (I think its intended to not stack). It should block usage like target painter.
Should be in suggestions, because this is not a bug (no debuff stacks and for most mods you get cooldowns even when you cannot use them).
Debuffs of same kind do not stack. It will however apply to target unless it’s weaker than existing one.
It will reset the timer on the web on your target as well, when the previous runs out, yours will go into effect for its remaining time.