You might want to post a sollution here, readers might not wade throught the posts to find out that there may not be a problem with the RFM95 at all.
Off-topic because this appears to be LoRa (library) but not LoRaWAN related.
If there are any LoRaWAN related (hardware) issues with RFM95W then please post them in the following topic: Experiences with RFM9x and SX127x based SPI LoRa modules