confusing invalid UTF8 byte sequence error

Has anyone else ever found this error message confusing:

ERROR:  22021: invalid byte sequence for encoding "UTF8": 0xdb24

I think what is really meant is better expressed like this:

ERROR:  22021: invalid byte sequence for encoding "UTF8": 0xdb 0x24

Otherwise it looks like a codepoint or a 16-bit word (endianness?) or
who knows what.