Humnnn, I play in Private Group so both ships would still be in the same instance.Try breaking contact with your wing then begin the process of embedding the charges. See if that changes. While I was winged, same happened to me. No indicator because no charges were embedded. When they embed you get a countdown of plenty time to get away and you can detonate at any time until then by selecting the charge on the contacts panel and selecting "detonate now". It starts a 10 second timer, even that is plenty time to get away most of the time. I had the same experience while using multicrew with a forum member as well.
I wanted to play Wing in the hope that the wingmate with turrets would automatically attack the NPC that attacked the other ship. Doesn't seem to happen.
Building the Cobras or refitting the AspX's with a gimballed weapon and just Playing PG might let me get both ships into the fight with the turrets.
The down side would likely be that both ships AspX's would need PWS/prospectors to see the Fissures so I couldn't power a KWS to get the bounty's.
From a pure fire power perspective, the AspX's are superior to the Cobras. I already own them and they are considerably cheaper, more maneuverable and faster boost than the Python. The Python's only real plus is the 3 LG mounts.
If I can get both AspX's into the fight,, this build --->>> https://coriolis.io/outfit/asp?code=A2pftfFflidfsnf52828243P3Sw00404002x4f041qC02tP42i24.Iw14AxePEA==.Aw18eQ==.H4sIAAAAAAAAA2P8Z8/AwPCXGUj8qQcSHHdYGRj4VX79/y+mwcXA8J/5nxRInhUkX8EAlRLawc3AIFIjysAgAVL+/z8DAwCLbM2pSAAAAA==.MwegjAdArO0gDCYAmEAOEBDANtglpgHYDGApgPrEAWO2phA5qQE4gjLzCLcJA===
Or this since I needed missile defense ---->> https://coriolis.io/outfit/asp?code=A2pftfFflidfsnf52828243P3Sw00400012x4f041qC02tP42i24.Iw14AxePEA==.Aw18eQ==.H4sIAAAAAAAAA2P8Z8/AwPCXGUj8qQcSHHdYGRj4VX79/y+mwcXA8J/5nxRInhUkX8EAlRLawc3AIFIjysAgAVL+/z8DAwCLbM2pSAAAAA==.MwegjAdArO0gDCYAmEAOEBDANtglpgHYDGApgPrEAWO2phA5qQE4gjLzCLcJA===
Should be able to handle an Alliance Challenger