LoRa-SDR simulation example problem

Hello all.

Using this example from the LoRa-SDR, I am able to run it but I am experiencing a weird behaviour.

I receive packets 0 to 9 and then
211, 213, 214, 216

286, 288
511, 513, 514

566, 568, 581


Below you can see a screenshot to better understand what is happening.

My question is, I am doing something wrong or is something wrong in the demo code ?

From what I see someone else is having a similar issue.

Thank you for your help.