Playing around with different ways to use fighters, I've come across some wonky behaviors with how fighters behave when under the Regroup order. When an enemy is very close to the carrier, within roughly ~500su, your fighters will automatically start attacking it. However, they won't attack it in the normal fashion - they'll instead adopt an orbit attack pattern regardless of what they normally do under the Engage order.
This affects FIGHTERS and INTERCEPTORS, BOMBERS are unaffected, and SUPPORT fighters ignore Engage and Regroup orders completely (see
here for that issue).
This video uses the vanilla Warthog (the only mod present in this video is Tart's target practice mod) and showcases the change in behavior as you toggle Engage and Regroup, but you can also spot the lead Warthog fighters offsetting themselves from the target when set to Regroup.
Here's a video using a mod to better illustrate the issue - you can see the gunship's beam firing straight ahead, but the gunships themselves are offset by a considerable margin. Other fighters in the same wing, if any, are unaffected by this issue. The lead fighter angle offset appears to be the same regardless of what weapons they use, and the smaller the target, the longer the range, the worse the issue becomes, so much so that the lead fighter may not be able to fire it's weapons at all. Fighters with only one or two per wing with hardpoint weapons are hit particularly hard by this.
This is a fairly niche issue that affects almost nothing in vanilla, but for what it's worth, a few mods make these issues more noticeable.
