Data loss after 256kb on old MetaWear C but not new MetaWear C
We have 2 pairs of MetaWearC boards (one pair purchased ~ 1 year ago, one pair purchased this month). We run 60-min data collects with accel at 25 Hz. The old pair only ever transmits 254 kb of data (only the first 2 minutes of the data collect) and the other pair transmits the full 60-min of data. We have replicated this across multiple iOS devices and computers. Since the flash on these devices is 256kb, it seems like a critical failure of live streaming.
What is wrong with the old pair?