How to get the received ping of ros v7.x?

Hello,
As shown in the figure, through ping, v6.49.2 can obtain the received value of 2; but v7.2.1 obtains the received value is empty (nil).
In v7.x, this method can no longer be used to obtain the received value. Is there any other way to obtain the received value?
ping_v7.x.jpg

Missing ping number seems to only bee seen with count=2. Try count=3
This looks like a bug and MT should fix it.

[jotne@RB951-2] > :put [:ping 8.8.8.8 count=2]
Columns: SEQ, HOST, SIZE, TTL, TIME
SEQ  HOST     SIZE  TTL  TIME     
  0  8.8.8.8    56   53  17ms540us
  1  8.8.8.8    56   53  17ms770us


[jotne@RB951-2] > :put [:ping 8.8.8.8 count=3]
  SEQ HOST                                     SIZE TTL TIME       STATUS                                 
    0 8.8.8.8                                    56  53 17ms843us 
    1 8.8.8.8                                    56  53 17ms499us 
    2 8.8.8.8                                    56  53 17ms694us 
    sent=3 received=3 packet-loss=0% min-rtt=17ms499us avg-rtt=17ms678us max-rtt=17ms843us

3