I came across something that may be of interest, may possibly be a bug…
If I set the billing date for a recurring invoice to say the 3rd of the month and then set the final invoice date to the 3rd of the month say six months in advance then on the 6th month and that 3rd day no invoice is produced.
Workaround: I set the end date to one day after the billing day.
Hope that makes sense.