Button loses border when zoomed in

As the tittle says the border of my button disappears and the button gets thrown to the side of the bar after a certain zoom level how can i fix this?

150% Zoom and 125%

Here is my site Read-Only: [LINK]1
(how to share your site Read-Only link)

It’s probably switching to the mobile query at that zoom level. Make sure the button is styled correctly for mobile and retest.
If this doesn’t work, we’ll need your share link to inspect the working file.

I will try what you suggested, thanks

It was that indeed, many thanks.