Not sure without seeing your read-only link. If you can post that.
Now the javascript in WF will sort of hesitate on the initial load of the preview. Just give it a second before you actually trigger it. There is a slight delay from server to browser.
Hi there, well I cannot be too sure, I am finding it a little difficult to reproduce, but I can see that on the ‘drop’ legacy interaction, you have a 0px height set with a 50ms delay.