Squiggly control line

Hey Glow!

I tested earlier this morning with a FRER test and my control line is squiggly? Not like completely zig zag, but like there is some dye pulling? I tested kinda early cos I’ve been peeing more frequently so I’m not surprised by the negative but all my control lines before have been pretty crisp. Does this have any meaning or nah?

Pic for ref. Excuse my outgrown mani. Home girl can’t get them filled until Friday since kids are distance learning this week (thanks COVID) 🤷🏻‍♀️