Trying both the released v0.0.2 as well as the current code from github, I'm not able to get the Checkbox Component to fire an AJAX event on change, with PrimeFaces 6.0. Reverting to PrimeFaces 5.3 results in the MaterialPrime checkbox firing AJAX events as expected. Other MaterialPrime components such as input and button seem to be working fine with AJAX and PF 6.0.