Just got a EX-4S from Costco after Christmas and have done 4-5 rides. When I REDUCE resistance the bike feels like it really loosens up and then tightens back down at the new lower resistance level. For example, if I'm climbing at 24 and then reduce to 20 for a recovery, the bike momentarily lets go of the tension/resistance and then reapplies it at 20, so it feels like it goes down well below 20 before correcting itself. It does not do this when increasing resistance. Anyone else experience this?