Rebalancing bot has 2 ways to rebalance the tokens, first is time based, second is threshold based. Using time based will always rebalance your basket periodically every x period. Meanwhile threshold based makes the rebalancing bot only do rebalance if the current ratio is move too far away from the initial ratio. Your position might use threshold based, and which the ratio of your basket is still not volatile enough to do transaction. Anyways this is a good news for you since you will transact less, thus less fees for you to pay.