Basically, it is possible that some or all the money paid to you since entering into bankruptcy was supposed to be part of the estate when it comes to liquidation.
When Spirit liquidated in say, October, it may happen that a sum of money is entitled to creditor so and so who has priority before you the worker. So that money could be clawed back at any moment.
Even if you leave Spirit prior it being shutdown, as long as your bank info is know to the estate your money could be sized.
Shutdowns are no fun.