I added a column that should show a QR code for the URL of that line.
The QR code is rendered and the test works. After a few seconds QR code rendering pattern changed to a pattern that seems an error pattern and it don’t work anymore. When I open the formula for editing, the working QR code is shown in the preview.
In the screenshot you see the working code in the front and the wrong code in the back.
Any idea what could be wrong?