@rcoleman-netgate here is a PCAP. I believe the delay to be the Request By the Computer asking who 130.140.1.1 is and the Computer IP is 130.140.1.78 I believe this hand shake when 20 Chrome books are opened at the same time may be the delay. please let me know what you think.
18:17:12.757414 IP 130.140.1.78.45893 > 130.140.1.1.53: UDP, length 33
18:17:12.800455 ARP, Request who-has 130.140.1.1 tell 130.140.1.78, length 46
18:17:12.800459 ARP, Reply 130.140.1.1 is-at 90:ec:77:2e:23:66, length 28
18:17:12.894371 IP 130.140.1.78.5353 > 224.0.0.251.5353: UDP, length 117
18:17:13.145360 IP 130.140.1.78.5353 > 224.0.0.251.5353: UDP, length 117
18:17:13.216904 IP 130.140.1.78.50345 > 130.140.1.1.53: UDP, length 34
18:17:13.223810 IP 130.140.1.78.5353 > 224.0.0.251.5353: UDP, length 33
18:17:13.224656 IP 130.140.1.78.39310 > 239.255.255.250.1900: UDP, length 176
18:17:13.264188 IP 103.41.69.203.443 > 130.140.1.21.56272: tcp 31
18:17:13.369452 IP 130.140.1.21.56272 > 103.41.69.203.443: tcp 0
18:17:13.396245 IP 130.140.1.78.5353 > 224.0.0.251.5353: UDP, length 117
18:17:13.464245 IP6 :: > ff02::1:ff44:b751: ICMP6, neighbor solicitation, who has fe80::98f3:cdff:fe44:b751, length 32
18:17:13.504526 IP 130.140.1.78.39790 > 130.140.1.1.53: UDP, length 32
18:17:13.568218 IP6 :: > ff02::1:ff82:f129: ICMP6, neighbor solicitation, who has fe80::681e:6ff:fe82:f129, length 32
18:17:13.597080 IP 130.140.1.78.5353 > 224.0.0.251.5353: UDP, length 105
18:17:13.636389 34:60:f9:3e:4c:09 > ff:ff:ff:ff:ff:ff, RRCP-0x25 reply
18:17:13.725156 IP 130.140.1.78.41801 > 130.140.1.1.53: UDP, length 33
18:17:13.772959 IP 130.140.1.78.8735 > 130.140.1.1.53: UDP, length 33
18:17:14.227125 IP 130.140.1.78.39310 > 239.255.255.250.1900: UDP, length 176
18:17:14.228747 IP 130.140.1.78.55421 > 130.140.1.1.53: UDP, length 34
18:17:14.516916 IP 130.140.1.78.26674 > 130.140.1.1.53: UDP, length 32
18:17:14.735840 IP 130.140.1.78.20216 > 130.140.1.1.53: UDP, length 33
18:17:14.815218 IP 130.140.1.78.5353 > 224.0.0.251.5353: UDP, length 105
18:17:15.228837 IP 130.140.1.78.39310 > 239.255.255.250.1900: UDP, length 176
18:17:15.406804 IP 192.168.2.15.5060 > 69.84.152.140.5060: UDP, length 496
18:17:15.496426 IP 142.250.190.42.443 > 130.140.1.41.34848: UDP, length 157
18:17:15.496446 IP 69.84.152.140.5060 > 192.168.2.15.5060: UDP, length 601
18:17:15.590042 IP 130.140.1.41.34848 > 142.250.190.42.443: UDP, length 33
18:17:15.636337 34:60:f9:3e:4c:09 > ff:ff:ff:ff:ff:ff, RRCP-0x25 reply
18:17:15.648896 IP 142.250.190.42.443 > 130.140.1.41.34848: UDP, length 157
18:17:15.652443 IP 130.140.1.41.34848 > 142.250.190.42.443: UDP, length 34
18:17:15.781370 IP 130.140.1.41.34848 > 142.250.190.42.443: UDP, length 33
18:17:15.795484 IP 130.140.1.78.12841 > 130.140.1.1.53: UDP, length 33
18:17:15.840301 IP 142.250.190.42.443 > 130.140.1.41.34848: UDP, length 25
18:17:15.937358 IP 130.140.1.78.44996 > 142.250.111.188.5228: tcp 26
18:17:16.023659 IP 130.140.1.78.56339 > 130.140.1.1.53: UDP, length 53
18:17:16.037245 IP 130.140.1.78.55934 > 130.140.1.1.53: UDP, length 43
18:17:16.039043 IP 130.140.1.78.5619 > 130.140.1.1.53: UDP, length 34
18:17:16.045365 IP 130.140.1.41.34848 > 142.250.190.42.443: UDP, length 33
18:17:16.066272 IP 130.140.1.78.39005 > 130.140.1.1.53: UDP, length 35
18:17:16.066488 IP 130.140.1.78.20031 > 130.140.1.1.53: UDP, length 47
18:17:16.112145 IP 142.250.190.42.443 > 130.140.1.41.34848: UDP, length 25
18:17:16.201394 IP 130.140.1.78.44996 > 142.250.111.188.5228: tcp 26
18:17:16.222290 IP 130.140.1.78.5353 > 224.0.0.251.5353: UDP, length 40
18:17:16.223315 IP 130.140.1.78.5353 > 224.0.0.251.5353: UDP, length 40
18:17:16.223971 IP 130.140.1.78.5353 > 224.0.0.251.5353: UDP, length 46
18:17:16.224550 IP 130.140.1.78.5353 > 224.0.0.251.5353: UDP, length 45
18:17:16.225050 IP 130.140.1.78.5353 > 224.0.0.251.5353: UDP, length 34
18:17:16.225395 IP 130.140.1.78.5353 > 224.0.0.251.5353: UDP, length 33
18:17:16.225744 IP 130.140.1.78.5353 > 224.0.0.251.5353: UDP, length 44
18:17:16.229370 IP 130.140.1.78.39310 > 239.255.255.250.1900: UDP, length 176
18:17:16.251355 IP 130.140.1.78.14830 > 130.140.1.1.53: UDP, length 34
18:17:16.271198 IP 130.140.1.39.5353 > 224.0.0.251.5353: UDP, length 1436
18:17:16.271623 IP6 fe80::217:c8ff:fe84:30.5353 > ff02::fb.5353: UDP, length 1436
18:17:16.276728 IP 130.140.1.78.5353 > 224.0.0.251.5353: UDP, length 60
18:17:16.277288 IP 130.140.1.78.5353 > 224.0.0.251.5353: UDP, length 61
18:17:16.278096 IP 130.140.1.78.5353 > 224.0.0.251.5353: UDP, length 71
18:17:16.278943 IP 130.140.1.78.5353 > 224.0.0.251.5353: UDP, length 71
18:17:16.317286 IP 130.140.1.41.34848 > 142.250.190.42.443: UDP, length 3