Unfortunately on some devices there is serious problem with calendar integration. The good news is that it works well on many more devices. I am working on solution but it is not ready yet. So until there is no working solution, one step back was made: a special version 0.3.23 step back was prepared, which has disabled functionality causing a problem (integration with calendar).
If you want to try if on your device integration with calendar works well, you can use 0.3.24 beta version (here is the link).