HTTPING and IPv6 - interface not available

Does HTTPING work in IPv6?

When I configure X3000 cellular router to use HTTPING on both IPv4 and IPv6, I get interface is not available for IPv6.

When I change to PING, then both IPv4 and IPv6 do not display interface not available.

I'm guessing the issue is a missing -6 option when running httping

Which scripts need to be updated for HTTPING IPv6 to work? @ywp - would you happen to know which scripts to modify?

What phenomenon does this refer to??