Slow take-up of spaces and enter for new subjects

I'm having two problems with the spacing and new subject commands not being taken into account.
This happens when you type quickly on the keyboard.
Case 1: I press Enter to create a new topic, then immediately type some text. In this case, spaces are not taken into account until one or two seconds after the topic is created, so the beginning of the text typed has no spaces.
Case 2: I finish typing the content of a topic, press enter to validate it and then immediately press enter to create a new topic.  In this case, the creation of the new topic is not taken into account.

It seems to me that this is a bug linked to the responsiveness of certain commands.

I'm using the latest version of Xmind on MacOS.