In MacOS SplitView mode Calc turns off one of the splitted window or shuts down with error.
@Igor : please explain what you mean, and provide reproducible steps so that I can try to repeat the behaviour. It would be good if you could provide a test Calc file that triggers the buggy behaviour, unless it happens with all Calc documents. I opened a new Calc document, added some text data, clicked on Window > New window, no crash. Tested against master 5.3.0 alpha and LO 5212 release Setting to NEEDINFO, please set back to UNCONFIRMED once you have provided the requested information
Bug no longer occurs.