I spent a couple hours trying to find a solution to the flickering issue and concluded that it's simply not possible to get rid of entirely. The issue is that the game doesn't allow for telling the ship not to set a specific weapon group to autofire or select it.
You can tell the ship not to do that to any weapon group, but even then, for some reason, it seems to occasionally try to do it. That's why even with the ForceAF-
ship-mode you will see occasional flickering.
Therefore, when using the ForceAF-
tag, I cannot tell the ship not to select that specific weapon group. It will then periodically try to select it (or disable autofire), in which case the tag will tell it to deselect it again an set it to autofire.
What I did do though, is to make it so that if you set EVERY group to ForceAF, it will forbid the ship from selecting a new weapon group or disabling autofire, just like the ForceAF-
ship-mode.
During the whole investigation I also found another bug, where, when removing ForceAF as the last standing tag, it would not actually get removed properly. I fixed that.
I'll wait a few days to see if any other issues get reported before releasing a fixed version, but you can always use the current
master version, which already includes these fixes.