Empty values at iPhone devices for stats [ ssl , initiaConnection, dnsResolution]

we don’t see values[ssl connection, initial connection, dns resolution] are getting generated for iphone devices such as 8, 5c, 7

please find results

https://www.webpagetest.org/result/190426_KY_03320c4b59300dc48addb5dbaa0953cc/

https://www.webpagetest.org/result/190426_CN_1494338fd3b6f777ae064408d6914c39/1/details/#waterfall_view_step1

https://www.webpagetest.org/result/190426_E6_8525fce15801ca8e83d664eff7a44608/1/details/#waterfall_view_step1

It looks like this is a known issue:

https://www.webpagetest.org/forums/showthread.php?tid=14330&pid=28023#pid28023

thank you jose, for routing me to the required post .