It seems, you have dragged the controls and that gets your css file affected.
Can you have a quick look into the stylesheet. Probably you have some input class that gets affected.
Let me know, if this solves.
OK - When I looked at the page source I noticed that a style property was added to every control on the page. I was able to fix my problem by adding the same style property to my original code.
(By the way, I still don't understand why my solution works exactly.)
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