Error when clicking flat property of TWebSpeedButton

Using latest VSCode and latest Web Core (2.0.5999).

Add a TWebSpeedbutton to a form.
Now, when double clicking on the flat property to change its value from FALSE to TRUE, there is an error message ("undefined"), and the control disappears from the designer view.

We could reproduce this and we are investigating. Seems strange and non trivial issue.

We traced & solved this issue. The next update will address this.

Update already here - now it works. Excellent, thank you very much for the quick fix!