Pinging unreachable IP eventually blocks (for some time)

I found that if I do ping to an unreachable address, such as 192.186.0.1 when no interface is set to that net, ping ends after 10 pings once, but a second call blocks at ping number 5:
```
NuttShell (NSH) NuttX-10.0.1
nsh> ping 1.1.1.1
PING 1.1.1.1 56 bytes of data
No response from 1.1.1.1: icmp_seq=0 time=1000 ms
No response from 1.1.1.1: icmp_seq=1 time=1000 ms
No response from 1.1.1.1: icmp_seq=2 time=1000 ms
No response from 1.1.1.1: icmp_seq=3 time=1000 ms
No response from 1.1.1.1: icmp_seq=4 time=1000 ms
No response from 1.1.1.1: icmp_seq=5 time=1000 ms
No response from 1.1.1.1: icmp_seq=6 time=1000 ms
No response from 1.1.1.1: icmp_seq=7 time=1000 ms
No response from 1.1.1.1: icmp_seq=8 time=1000 ms
No response from 1.1.1.1: icmp_seq=9 time=1000 ms
10 packets transmitted, 0 received, 100% packet loss, time 10100 ms
nsh> ping 1.1.1.1
PING 1.1.1.1 56 bytes of data
No response from 1.1.1.1: icmp_seq=0 time=1000 ms
No response from 1.1.1.1: icmp_seq=1 time=1000 ms
No response from 1.1.1.1: icmp_seq=2 time=1000 ms
No response from 1.1.1.1: icmp_seq=3 time=1000 ms
No response from 1.1.1.1: icmp_seq=4 time=1000 ms
No response from 1.1.1.1: icmp_seq=5 time=1000 ms
```
This hangs here but after maybe about a minute continues sending pings about 1 per second
and then finishes:
```
No response from 1.1.1.1: icmp_seq=6 time=1000 ms
No response from 1.1.1.1: icmp_seq=7 time=1000 ms
No response from 1.1.1.1: icmp_seq=8 time=1000 ms
No response from 1.1.1.1: icmp_seq=9 time=1000 ms
10 packets transmitted, 0 received, 100% packet loss, time 70120 ms
nsh>
nsh>
```
I tested this on ESP32 with WAPI config, but I'm not sure that is relevant.