I have now released version 1.0.57.0 of DFFS for the Modern SharePoint. It fixes a bug related to rules triggering on boolean fields – see the full change log here: https://spjsworks.com/changelog
Read more and get your license over at SPJSWorks.com
Post any feedback in the forum here: https://spjsblog.com/forums/forum/modern-dffs/
Alexander