Are you sure its bending and not just loose? Tighten the nut on the underside of the mount and then see if it moves/bends.
Or you could just remove it. Then lean it against whatever is around -- wall, fence, railing, tree, etc. If you lay it on its side, make sure its with the non-drive side on the ground.
__________________
The Lord is merciful and gracious, slow to anger and abounding in steadfast love. - Psalm 103:8
I am a cyclist. I am not the fastest or the fittest. But I will get to where I'm going with a smile on my face.