When I use the animate property on height, and set the height to "0%", it instantly goes to this value instead of animating in to it. I use this in the following scenario:

I have a variable, lets say: h. This variable is calculated based on other variables and can be zero. This variable indicates the height of a certain element in percentage. Whenever this value is lower the 3 the animation instantly snaps to the target value. A solution to this is pretty simple but I thought it's not that easy to discover the problem when you don't know the cause of it.