I showed nutaku the screenshot in their Twitter post and they answered me
"
Thank you very much for the bug report, we will fix it with the next maintenance"
So the good news- they are aware of the bug now.
However, it doesn't sounds like they'll make a quick maintenance to fix, they'll do it along the next one which is probably the one for kyuuki and mastema's rematch next week.
So the ones that did hope to test her damage in later 4 will probably have to wait for next week to do so.