*UPDATE* The left margin of the containing div (rightPane) seems to affect the numericInputBox. Other control types are not affected. This is in FF only.
answered on 21 May 2018, 10:02 AM
I was able to replicate the issue.
I assume that the FF browser is doing wrong calculations, and it is hiding the input during the initialization due to the following CSS:
Having said that, is it okay for your project to remove this line of CSS?
An interesting behavior is that when I try to inspect the element with the FF dev tools, it immediately appears without any interaction from my side. Also, when the window is resized it appears again. This makes me think that after forcing the browser to do the CSS calculations again, it does them correctly.