I’m having the same issue.
In the attached mission, trimmed down to just the units that are causing the crash, I can sometimes run it for 10 minutes, sometimes run it to completion. But if I run it to completion, the next mission I run, whether it's this mission or something else, I’ll get a CTD on the “Net Start” portion of the mission load screen.
For reference, I’ve also run this mission but removed “At Start” or even just “Embark” entirely, and no crash occurs.
As mentioned before, about half the units don’t embark to their transport on start. Instead, they begin the embarkation procedure on mission start. I tried removing the units that did not embark correctly, thinking it was a pathing issue, and then a different batch of units failed to embark.
At first I thought it might be a conflict with my mods. But I sent this mission to two of my friends who have no mods and they got the same results. All the same, I have the following: TacView; Civilian/Military Aircraft Mod; Su-30MKI; A-10, F-16, F-18 default countermeasures programs; Loadouts (e.g. AIM-9X for F-15C and HARM for MiG-29); Various skins such as liveries and English cockpits.
My computer specs are as follows:
Processor: 12th Gen Intel Core i9-12900K 3.19 GHz
RAM: 16 GB
GPU: GeForce RTX 3080
OS: Windows 11 Home
dcs.log
dcs.log-20230207-042044.zip
Only Offenders.miz