Like De Niro said, 'If there is a doubt, there is no doubt.'
If you're fussed over a UV filter, it's no better than it ever looks. Hope you didn't pay too much.
I mean, go ahead and test what you've got, but, hey, nothing we can say will improve it. Frankly, if you have to ask, you should either be able to see it's a problem or know what you bought. if you want to get picky, remove it. You probably have a lot more money and decades less experience than I do and I promise I only use UV's on the beach or in blowing grit Or to save time after the first time toddler-fingers or dog noses must have a little poking at a big lens.
(Also, you know, even the absolute finest UV filter possible cannot compare to no filter at all. Don't sweat the finer points till you know why and how.
)
Also, filter or no, put a hood on there. Filter or no, the very best a piece of flat glass can do is pretend to not be there. With a proper hood, that won't matter.