Any chance you installed a 68 mm bb on a 73 mm frame and the nds cup isn't snug against the end of the cartridge? Also, are the crank arms torqued properly so they aren't moving relative to the spindle?

Otherwise these bottom brackets are very rugged and bumping it should do nothing harmful unless done with your car.

As a first step, I'd remove the bb and see if there is any play in the cartridge when it's out of the bike.