but non-base bunkers also used to have a shorter sight range and there wasn't anything i remember from patch notes. it's also stupid from a balance point of view given that standard MGs can shoot further than they can see.
I'll try to explain a bit more:
1) Map Designers didn't want Base Bunkers to cover too farr outside the HQ territory
2) I couldn't find any changes to the MG on Bunkers
3) There is another UI Firing Arc Issue. UI is drawn from the center of the building and not the HMG itself.
Hope this helps