Why does the WRAP4 start with a NONSEQ?
According to Table 3.1 Transfer Type Encoding, HTRANS=NONSEQ specifies the following which contains the answer:
Indicates a single transfer or the first transfer of a burst.
The address and control signals are unrelated to the previous transfer.
Single transfers on the bus are treated as bursts of length one and therefore the transfer type is NONSEQUENTIAL.