I tried to look at immunes and could not find anything that would prevent dyson gatling from firing on Neinzul Hybrid. I am pretty sure they do fire at them in the past. They still do shot at the shield module so there is that.
Dyson gatling has zero modifier for command-grade and hybrid has heavy armor. So it can't be that. Neinzul hybrid base gun has range of 4500 while dyson has 12k so can't be range issue.
Neinzul hybrid are firing at dyson gatling so.