Western Conifer Seed-bug

Maybe of interest
Since the first record on the islands approx five years ago I have seen 2/3 per year here.The first record in 2013 was 1/10 followed by a couple more singles.On 6/10 at 15.00 at least 15 were released from our bedroom/bathroom with 25+ the next day.The rest of the month saw low numbers.They fly strongly !
As this occured during moth migration are these likely to be migrants or a emergance ?