the issue you are describing I am currently investigating. During the initial/current designs I chose to set 00:00 sharp divide between days to allow easier calendar integration. However, due to feedback from you and several other users I am working on fixing this (together with several other known bugs) in the next release.
React Native's bridge latency made the interactions feel slightly sluggish.
Looking back, React native would have been beneficial for cross-platform cause now I am breaking my head with Kotlin