Event drag feature in JavaScript lite version is not working on corner cases.
Please follow the instructions given in the following example to realize the issue
https://jsfiddle.net/fsa76zoe/
Thanks
There was a bug in the calculation of the grid boundaries. It’s fixed now in the latest sanbox build (2024.2.525):
https://release.daypilot.org/changes/jslite/
Test:
https://jsfiddle.net/ucvksntf/4/