Interesting thought, the boat is often on a bit of a tilt.
Also though, had the same thing happen this year. This time I noticed some moisture beneath the starboard drain. I think I might have had a slow leak from that drain, dunno if it was there last year. This season I'd have a couple of cups of water in the bilge after running. Small enough that I thought it might be just from getting in/out of boat/water, but wondering if it just drained out in the couple of weeks between sitting and draining. I did notice that it took a while on muffs before it started exiting, but I didn't pay it too much mind at the time. If it's not too cold I may pull the leg next weekend and run it on a hose, see what comes out the drains.