PowerPoint Stroke BUG

Hello Everyone! 

I currently work on a variable font with a lot of masters (32) and I receive some report from a client that the font has problems when using the stroke on PowerPoint (From the OTF files). The stroke is not centered on the font, it must be a box problem when I configured them on Fontlab (it Works fine on Adobe). I tried to change it (Safe Bottom/Top, BBox etc...) multiple times but without success. The only way was to recreate the font from the beginning. I can share with you some data from the font and a screenshot of the problem.

Does anyone already face this problem? If you guys have any idea how to resolve this I would love to know it!