I wasn't sure if this belonged here or in general techniques, but it seems like a beginner's sort of problem. While racking from primary to secondary, my siphon hose seemed to slip on the racking cane, leading to some air entry and cavitation in the flow. This air space grew and the siphon eventually stopped. Restarting the flow took a few tries and led to a fair amount of bubbling through the now half-full secondary. Initially i chalked this up as a RDWHAHB moment, but the more I've thought about it, the more I'm concerned about oxidation. Comments from the more experienced?