Do you see any error in the JavaScript console? Does the whole page freeze (do other element on the page work) or is it just that the Calendar doesn't respond to mouse actions?
I know that it might be difficult, but is there a way to reproduce the problem?
You can try the Pro version to see if you are able to reproduce the problem there:
https://javascript.daypilot.org/try/
Anyway, I'd like to have it fixed for the Lite version as well if it is a reproducible problem.