First off, Modern DFFS is amazing. I love it! I look forward to seeing what else will be coming to it.
I’m testing vLookup and noticed situations where the form loads twice when I refresh the page or exit DFFS configuration. I didn’t start seeing it until I added a vlookup on the form but didn’t complete it’s configuration. It doesn’t seem to occur when selecting New or Edit. I did a screen record to capture it if you’d like me to send it to you.