Ever had a bag with one strap darkening up more than the other?

Hi ladies,
I purchased a mono bag with vachetta rolled handles. It's from the boutique and brand new. It's a bag being discontinued so LV Customer Service had them call me to order the bag. I did ask them to look it over closely, make sure things line up...yea all,is,good.

When it arrives it all looks good but I notice one of the straps is slightly darker than the other.
I even sat it in the window to tarken up to catch it..covered the one that already has color. That didn't seem to work.

I've still not used my bag because of our nasty weather, but even with it just sitting out the darker dpstrap is darkening up more.

My question is,,,any of you ever have,this problem and what did you do to get them to color up evenly. Or did you exchange the bag?

Any info is appreciated. Thanks

 

A year???? I don't think I'm that patient