That's probably a browser related issue, and the way the browser is interpreting the drop-down box immediately where it should wait for input.
Just started happening in the last week or so.
Click the drop down again and it will move it to the top so you can still scroll through it but it's out of the way.
Edit: nevermind. I see someone else already said this and it doesn't work for you.
Did the browser update in that time?
The browser updates all the time. It's an android app, so updates happen all too often.
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