I have exactly copied the standard demo, " Event search with sidebar", to a bare bones react project. It is behaving strangely regarding date navigation. See video below.
Thanks for reaching out and sorry about the trouble!
NOTE: please don’t post such a project publicly with the npmrc on it since this will provide access to your Mobiscroll account to everyone.
Regarding the problem: as I see, in the React version of this demo the onSelectedDateChange handler is missing. We recently fixed it so, now you can download it again and it should work as expected.