IPv4 in not decoded correctly inside GRE

[paulbir]

I have a packet with these layers:
Ethernet > IPv4 >GRE (PPP) > IPv4 > UDP
And inside GRE IPv4 layer is decoded wrong.
I've attached wireshark pcapng with this packet and raw byte data.

Thanks.
packet.zip

[bricknerb]

Please ask questions in Pcap.Net Q&A group.

Also provide the code you're using to decode, what is your expected result and what is the actual result.