Bug? Mashin3 tools add rotation after setting pivot

Greetings community,

when I use mashin3 tools to set the pivot of an object, mashin3 tools add weird rotation data to the object.

I use mashin3’s pie menu “Cursor and origin” which is on SHIFT+S by default. In the screenshot you can see the rotation is now, after setting the pivot, at [35.3, -135, 90]. This data changes when setting the pivot to different vertices, but still they are there and I don’t want mashin3 tools to add rotation-data without me asking for it.

Does anyone encountered the same bug (feature?) and knows how to turn it off?

Thanks in advance!