I’m actually writing this to find out if any of you encountered similar problems.
Whenever it rains, taxiing requires much more power.
Now, I realieze I’m flying the FBW A320nx, so the problem might be on the side of the addon. I do not fly many other airgraft, so it’s hard for me to determine correct power levels. Anyway: on a dry taxiway, the A320 will start moving and slowly accelerate to approximately 30 knots on idle power. This seems to correspond well with reality. When it rains, however, it requires N1 of 40% to start moving (which is way higher than you are even allowed to use). Then, when you get to some 25kn (will not go much faster than this) and you remove the power, the aicraft will begin to slow down to an eventual stop. Like there was some… magic resistance that would cause friction or like if the engines sudenly lacked power. (take off, however, does seem to eb far less impacted)