Losing the ability to fly
A few years ago, when flying became the trigger that allowed me to DILD, I was able to keep on flying, high and fast, but without much control over the dream content(s).
The more I gained control over the elements, the less I was able to fly, at least not as high nor as fast. Now, I can easily induce to a lucid dream (WILD), but the ability to fly by myself fails very often. To "levitate", I have to command a levitation ability to occur, and when it does, it's not much more than a common levitation.
This has been noticed by other members. Feel free to share your experiences in this matter (the loss of the flying ability).