Sheet Formatting Going Crazy

Anybody know why the fill for several of my sheets has changed? Below is what the yearly budget sheet looks like and below that is the headers for the transaction sheet. I don’t have a clue what triggered this.

That’s a really odd one!

I can’t find anything online about this and haven’t seen it before.

It’s almost like it’s disabled for editing or something.

If you select a header row on the Transactions sheet will it let you adjust the formatting to fill in the solid blue color or it’s just stuck that way?

I can change the header color but the weirdest thing is I can’t figure out how to get rid of or duplicate the hatched fill. I rebuilt both of the budget sheets and they’re fine now. The Transactions, Balance History, and Categories sheets all have the same weird hatch in the header row. Everything else is fine. Doesn’t really hurt anything but it is a little annoying.