Hoping someone can shed some light on an issue I am having trying to trigger different brands of speedlights from my D750. I just purchased the Godox V860ii. I bought this after reading good reviews about the built-in receiver. The instructional videos show that when the flash is in Commander or Master mode - it can trigger other brands of speedlights, as well as other Godox speedlights.
So I set up the V860II on-camera as the Master, and set up a Godox AD200pro and a Nikon SB-600 as slaves. All on same channel and group. I can get the AD200 to trigger with no problems. Cannot get the SB-600 to trigger in unison with the AD200. I can trigger each of them on their own and they work, but cannot get them to flash at the same time. I've tried multiple searches to see if anyone else has this issue and came up with nothing. I do have a Godox transmitter that is compatiable with Nikon and have also tried setting that up -- still cannot get the SB-600 to trigger, athough it will trigger the AD200 and the V860II in unison.
If anyone has any insight or work arounds for this, I would love to hear from you. Thanks.