Hi both,
Now that you mention it nachinus, I observed the same thing and actually took a screenshot (well, didn't remember the shortcut for the screenshot so actually took an horrible photo) - see attached. But I checked in the recent changelogs of DCS and didn't see anything related to the Gazelle. And they didn't use their gun either.
R.MES, if you find something that could be wrong with the mission and would like to test a remediation, feel free to send me the file and I'll check. Regarding your PC crashing, could be worth cleaning/updating stuff before considering a change. Syria needs a lot of DDR but if you managed to start it in the recent past, there is no reason why it wouldn't work anymore now.
Best,
highzur