Alas, it happens a lot, on most brands, and people often do not realize it as it is hidden by the pad.
Yes, water can get in the core. And you should try to make the warranty work, 2 months is a short time for this to happen. Especially for Starboard brushed carbon construction...
I recommend to check for this regularily: just fill the handle with soapy water, let it 3 minutes in the sun: if you see bubbles, time to repair!