Build: 1307.14
Scenario: Northern Fury 2: X-Ray Station
Units 135 LR ASW Regt #2 & 410 ASW Regt #13 have been given attack orders via F1. Both have been directly given Ignore Plotted Course While Attacking = yes. They were inherited = yes prior. You can see (especially when in 2 or 5x time) the units "twitch" their course between the target and plotted course, which was auto generated from their mission. You can also see their speed twitch between the station throttle of loiter and the attack throttle of full.
This bug had been marked as fix on a prior "ticket" I'd opened and run a simple test on using aircraft (leader would stay on plotted, wingmen would attack). This is the first scenario I've played since then (darn life getting in the way of gameplay

UPDATE: I've added a 2nd set of saves, this time from Northern Fury 3. Same behavior for air groups (so the bug isn't fixed per my previous post). Under the "bug" save, you can see that even after I've unassigned the group from the mission & manually assigned an attack order, the leader's throttle cycles back and forth between cruise and afterburner, and it's heading twitches back and forth from the previous heading assigned by the mission and the heading I manually assigned.