Hello Mikka,
I once took out an anubia that needed to be retied to some
driftwood and by the time I got done, it was dry and the leaves were curled. Man, that was a beautiful plant. When I got it back in the tank, the snails were in heaven and they ate most of the leaves. I thought it was a gonner but it has kept it's pretty green color and has not died. The leaves don't look as great as they once did but it is still here.
If the water current from the "waterfall" is too strong, move the plant or can you control the amount of water coming out of the filter? If your plant gets taller, it will really get beat up from the water current.
You're other plant that is in the front of the tank should be okay. As long as water is moving, that is good. Maybe that type of plant isn't flimsy so it doesn't move as easily...
Robin