Workbench wheels lift mechanism, failed

Everyone knows the wheels lift mechanism you install under the workbench to lift it off the ground and on the wheels, the one that is shown below.

Installed several years ago, it worked very well and served me by making it really easy to move the workbench around the shop and keep it in place without moving when needed. Apparently I needed it to move more than stay at position and only now I discovered that keeping it on the wheels most of the time caused the wheels plate to bow. It is made of hard Ipe and I expected it to hold forever, but it didn’t.

In the pics below you can see the deformed board.

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