I tested it, the behaviour is just as the OP described. When staying in just one pattern, the trigger sparks are doing their job, but when chaining two patterns, the counter seems to be reset.
The issue branches off to the wider topic of “song mode”, in my opinion. With song mode I mean the possibility to chain sequencer information while keeping the instruments fixed, and, in the current case, also the spark information.
For instance, I would like to sequence a longer piece that goes beyong the usual 4 bar percussive loop. For now, that does not seem to be possible without also copying the instrument information to the new pattern (did not try that, because it is too cumbersome). It would be just more convenient to have something like an “instrument kit” which stays invariant across patterns. The counter could then be reset at the end of the chained sequences, but also other approaches are imaginable, such as chain groups.
The thing with song mode is that one could realize more complex and interesting melodic compositions quite effectively. Not sure if there is a market for this, but, personally, I would find it more convenient for sequencing even simple songs that are longer than just one pattern.