that means that either the item is configured wrong, or your plugins are messing with the engine.
to check both options, please give us a screenshot of the item in the database, and screenshots of your plugin manager listing all plugins and their order.
then we can check for the possible causes.
and the item shows the reason why you got the wrong marker
The plugins you're using most probably default to HP if there is nothing set in the damage formula.
I suggest setting the damage effect to "MP Recover" and use the damage formula instead of the effect window, that should solve your problem.
I suspect part of your problem might be that you're using both Yanfly's Visual HP Gauge as well as MOGHunter's BattleHUD. The HUD has some handling of HP bars built in, so it's very possible you're getting crossed signals with those two plugins active.
I suggest you turn one of those plugins off at a time to see if the other is still popping up the wrong bar. I verified Yanfly's does not do that in a new project, but mixed with other plugins there might be problems.
I tried to check my plugins but I found the "problem". The Yanfly's plugin I use to view the gauge (YEP_X_VisualHpGauge.js) works only with HP!
To be able to view also the MP and TP I used the Waynee95's extension (WAY_X_VisualGaugesAddon.js).
Thank you for the support!
I'm so annoyed with myself...I can't get this code to work so it looks like I'm going the plugin route for a problem I should be able to do myself Great. Now I get to murder save file compatibility. Again.
Can't believe my code from four years ago is still working! Did some expansions, and...
In related news, I may have an update for my old Extra status window plugin ready. That is, once I manage to sit down and update the documentation... and the demo project...