ListIdentity Response Delay

In firmware products like netFIELD, but not in the vanilla firmware, we observe CTT17 errors/warnings like:

222   1> *** The DUT responded to ListIdentity Broadcast request in 1201 ms, slower than the expected 1200 ms. It may take longer time to read the response back than the actual packet 

and

277   2> *** The DUT does not generate response randomly as required by the specification, MaxResponseDelay: 1200 ms 

     actual delay(ms): 982, 437, 1170, 1201, 78, 266, 343, 624, 437, 234  

     mean: 577.20, standard deviation: 403.40. The error will be treated as a Warning in CT17.

     The time measurement may not be accurate, please verify with the Wireshark capture.

Maybe we should investigate again, if we can further improve here to avoid these errors/warnings, although this probably cannot be terminally solved.