After updating to the recent versions:
Kirby 3.4
Kirby-Builder 2.0.15
Kirby Markdown field 1.0.6
Adding a text field (Markdown field) with the Kirby-Builder plugin causes an initial js error âCannot read property âsplitâ of nullâ when the document is saved while the field doesnât contain any text. Refreshing the page will clear the message and the text field becomes available for input.