Hi! A few weeks ago my boyfriend gave me a Mullberry bag (black congo leather). Yesterday it got a few drops of rain on it, and today I see marks in the leather from the water. Like little bumps right where the drops hit it.. This has never happened to any of my other leather bags, is this specific for the congo leather perhaps? I'm taking it back to the store where it was bought as soon as possible (2-3 weeks), but I thought maybe someone here had the same experience with their bag?