From the manufacturer:

"Composite landing gear evenly distributes landing stresses, with a flowing shape that enhances the plane's overall appearance."

The engine is heavier than the recommended 32-43 cc; hence the gear may be flexing beyond the spring limit, getting deformed.

I suggest beefing the higher portion of each half with similar flat material on the inferior surface.
Glue will be better, but rivets could work.

A new gear needs to be thicker.