Contrary to public opinion, Bicycles are alive and have feelings just like any other animate object. When you discarded your old one in favor of the new bike, its feelings were hurt and was going to show you who's in charge. So, in a fit of pique, it did just that when you resurrected it for this ride. But alas, its resolve was short lived and it remembered how sweet and good and kind you had been to it for all those other years and forgave you your transgressions and became the bicycle you had remembered with fondness.
But be careful when you put it away again. Show it that you still care; pet its saddle and rub down its frame, give the chain a squirt of lubricant. It will appreciate it and be ready and willing to take you anywhere the next time you need it.
Love dies hard, even in bicycles.