I have a grid using the dialog edit mode, I have used a template for the edit form; within that, there is a RichTextEditor.
When the dialog opens, the RichTextEditor text area is unclickable (The toolbar is fine), inspecting the page enables the text area and it can then be clicked.
Similarly, once I have edited some rich text and saved it, if I then edit again the rich text area is again unclickable, however this time it is because the style height for the div with class e-rte-content has been set to 0px.
Sample attached to replicate both issues.
Attachment:
RichText__Shrinking_b68acf09.zip