rubber hose coming apart inside and temporally blocking fluid flow back to M/C! did have brake shoes stick to drums that was getting wet from a automatic transmission leak, was alotta fun!!
I've had this happen too. If your lines are old, they're not worth ignoring even if they don't fix the issue.
Binding of the caliper (regardless of slider/pin type), sticking of the piston, or even worn wheel bearings can all cause more drag on one wheel which can make it lock early. Dig into it and replace anything that is old/unknown/worn with quality replacements and it should go away.
