One problem may result from the fact that Novatron has a greater penetration into the amateur and casual shooter market, so packs are more likely
to sit unused for an extended period of time as compared to those that are used every day in a pro studio.
For as long as I have been in photography (>40 years), flash manufacturers, of both studio flash and speedlites, have been recommending reforming the capacitors on idle units at least 6 mo. intervals, plugging them in (if AC powered) and turning them on (AC or DC powered) for 1 hour.
A six-month interval is certainly reasonable. More frequent cycling doesn't hurt.
Problems can definitely be expected in equipment that sits unused for a year or more.