I'm not sure why, but I couldn't get my 560 to fire in S2 mode today. It works fine with my Canon 430exII in ETTL mode on camera, but with my Godox v860c on camera in ETTL, it won't fire. The v860c had no issues controlling the 430exII though.

Anyone else had issues with the 560 not firing in S2 mode?

I'm curious as to what is S2 mode?

Anyhow, JAY will be along soon.

It's supposed to ignore the pre-flash of ETTL, and fire on the main flash.