After updating matrix-auth plugin from 1.7 to 2.1.1 in jenkins system configuration ui the "Add Pod Template" button (provided by kubernetes plugin) does not display the pod template input fields as expected, instead button click has no effect. After reverting to 1.7. works as expected again.

Tested with Jenkins 2.60.3 and 2.73.2 and kubernetes plugin 1.0 and 1.1