Linebreak after zero.osf

I am working on numerals at the moment. In the latest cutting edge version I found a bug.
When you type a zero.osf, the line breaks automatically after.

It happens when you type it ‘Find Glyphs’, or even when you scroll through the glyphs (fn-arrowkey). And it happens when you type regular numerals and use the ‘Oldstyle Figures’ feature preview.

I can’t reproduce it. Can you send me the file and a screencast?

OK, this is weird… I couldn’t react earlier, so I wanted to do a screencast tonight. Now everything works…

OK. Now it happens with the one.tf.

I made a screencast. Will send you the file and glyphfile.

It happens to me as well. With different shapes each time I close and open again.

I have fixed this.