[Hummingbird Pro] Hummingbird minification prevents theme customiser changes to take effect

Hi there,

Trying a ticket as live chat doesn't work – just disappears!

Anyway, after making changes in Theme customiser, no changes to font colour, link colour, font size or custom css is shown in front end. If I choose "See this page unminified" changes are shown.

I have cleared full site cache, page cache, tried different browsers, private browser sessions logged out. I can only see changes when viewing unminified version of each page.

Any ideas?

Regards, Fred