grey background and wifi icon after log in

i'm on a mbp 2016 with Sequoia

it works great, but every time i log into my accont the wallpaper goes grey for a bit, the it changes to the actual wallpaper. similarly the wifi logo stays gray, like if there's no wifi connecton, but until i click on it, then it goes white.

any idea what it happens?

again, it's no big deal, but it bugs me

submitted by /u/BreakfastCapital5070
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