Filmstrip view different from masterslide

I am working on a responsive project in breakpoints view.

I created a master slide with my navigation and header + footer.

I positioned all my objects correctly on the Masterslide.

However, when I apply this master slide to my filmstrip view, one of my buttons is at the wrong position! I tried to press Reset Master Slide, but it remains incorrect. When I go back to my Slide Master view, the button is correctly positioned.

Anyone who faced such issue before?

Thanks!

Chloé