This is not only an A320-family problem. Happens on most airliners.
The A320 is somewhat less affected by this very phenomen because it heats up it's fuel a little (return fuel from the engine nacelles).
There is a widespread theory around that pumping the fuel around on the ground would ease the problem, but to my knowledge there is not much truth to it. Generally all fuel in one tank has more or less the same temperature, and the pumps themselves do not heat up the fuel.
hth,
Dani