Dragging a ticket increases the end date by a day

[peipert]

I'm not sure if this is an issue in the plugin or in redmine, but after upgrading both the dragging of a ticket leads to an increase of the end date by a day.

We had redmine version 4.2.10 and mega calendar version 1.8.1 where it worked normally.

After the update to redmine 5.0.8 with mega calendar version 1.8.1 the strange behaviour occured and stayed after upgrading to redmine 5.1.2 and mega calendar 1.9.6