Appchannel MTU inconsistent with CRTP max packet size

[TheCodeinator]

In https://github.com/bitcraze/crazyflie-firmware/blob/master/src/modules/interface/app_channel.h the maximum MTU of an Appchannel packet is defined as 31 bytes. However both in the cflib client library as well as the crtp firmware implementation the maximum crtp MTU is defined as 30 bytes. Therefore for example using the appchannel API in the cflib to send a packet with exactly 31 bytes of payload size will give an error. In my opinion this is a bug and the appchannel MTU should be reduced to 30 bytes in both firmware and documentation. Am I missing something or is this indeed inconsistent?

Have a nice holiday season