This is a major patch release that should address the rx deadlocks which
cause hangs in multiple nodes networks. Thread on this is here:
https://lowpowerlab.com/forum/index.php/topic,736.0.html
Also updated node/gateway examples, and wireless programming sketches.
Sometimes (especially 433Mhz versions) are too sensitive or there is more noise in the channel than usual. Touching the antenna or coiling it helps a lot but a more permanent fix is to adjust the sensitivity.
This addresses the issue when send sensitivity is too high and the radio will spend a lot of time reading RSSI to make sure channel is clear, resulting in dropped ACKs.