I've had the free Flightview free app on my phone for quite some time. Never used it until today b/c ... well ... had the paid app.
This "new" Flightview app is ad supported ($2.99 per month or $24.99 per year to remove ads). So much for my (admittedly long ago) purchase outright of the paid app.
Have added an upcoming trip to the newer app and will see if notifications return.
PS Mods, thanks for moving. As a long time (20+ years!) FT member/liflong user of Travel Technology group, I had no idea this one existed! Fascinating and added to my subscribed forums.