How big is your cake? 8" or larger?
And, did you line the bottom with parchment paper?

If the cake is 8" or small, it should be fine to line the bottom of pan with parchment paper, but if the cake is larger than 8", I suggest not to use the parchment paper.

Also, you don't need to grease and dust the bottom with flour to make it non-stick. Chiffon cake needs to be baked in a "stick" pan. If you use any ways to make your pan "non-stick", then the cake won't rise perfectly, and it will collapse when you turn it up-side down.