WIZ850io module SPI communication problem.

This post may help you understand what is going on. W5500 responds with 0x01 when it finishes first byte of the command, and expects second byte. In your case it seems telling you that 0x01 “I just have got first byte”, and never comes to second command’s byte.

The picture you attached is not clear what is going to CS. If you deactivate it after first byte, of course command will restart.