First Thing That I would like to clear out is that…👇
Xiaomi doesnt let global phones use unapproved icons, themes, fonts etc. If you changed any of these you will be reverted to default. Only way to design your theme or apply one is becomming a designer in miui website(theres tut at gearbest.com). Or you can adjust your current one in themes \app bottom right corner\ click button/ customize theme. You can mix things there. Take icons from one theme, bg or font from another one and so on. But the themes you must have downloaded from approved miui themes app. I had issue when 3rd party icon pack caused me this problem on a approved theme from miui themes app. Then i changed the pack through the miui themes app and problem solved
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