Now when I add .SVG icons, the preview in the picker is tiny, versus in the past, the preview would be full frame. See attached examples to illustrate what I mean.

I'm (knowingly) doing nothing different, been making custom .svg icons for many years, never had this issue. This only changed when I upgraded my computer, also Adobe Illustrator has been updated... I've checked the code, and I do not see anything different between the two files. Somehow the thumbnail is effected during creation, and not represented in the lines of code?

The icon works perfectly, just the preview in the picker is off, and its is more of an OCD pet peeve at the moment. Thanks for any help 😃 

OK!.. figured it out, with the computer and Adobe Illustrator update, my export prefs went back to default and I failed to
UNCHECK the Responsive option! ALL FIXED!