That data does not, in fact, appear to be text; either:
- the protocol is not, in fact, a clear-text protocol;
- it is a clear-text protocol, but it's encrypted, and the encrypted text is being displayed as if it were plaintext;
- not all of the protocol is in clear text, but you're displaying the non-clear-text part as clear text;
- the packet is being dissected by the dissector for that protocol, but it is, in fact, not traffic for that protocol;
etc..
