After moving some Lightnings from an Aerodrome to an Aircraft Carrier, I had noticed that the Lightnings were not showing up in the Aircraft Carrier, as though they had stopped existing. Once I moved on to my next turn, the Lightnings came back, so I thought things were fine, but I was wrong.

As it turns out, the extra Lightnings were showing up, but only when zooming in and out (I was using my mouse wheel for zoom). Sometimes the extra Lightnings would show up with the Battleship armada (which shouldn't be able to house the Lightings), and sometimes the Lightnings would show up in the middle of the ocean, which was also dependent on zoom level.

What I was expecting was the Lightnings to be properly housed in the Aircraft Carrier.

To the best of my recollection, these are the steps I took to observe this phenomenon:

1. Moved an armada consisting of 4 Battleships, 3 Nuclear Submarines, and 1 Aircraft Carrier within range of Lightnings at an Aerodrome for transfer.

2. Move the armada back a few tiles.

3. Split the Battleships into their own Armada.

4. Zoom in and out to observe various phantom Lightnings.

Here is a save file of when I had first encountered this issue:

double_lightning_group.ctr

Here are the diagnostics files that should be most relevant:

late_night_session_diagnostics_files.zip

Here is the player log that should be most relevant:

Player_log.zip

Here's a screenshot of the Lightnings when I thought they were fine, after moving my armada back into position:

Here's a screenshot of armada split apart, note how there are now 5 extra Lightnings showing up where the Battleships are:

However, if one were to zoom in sufficiently, suddenly the extra Lightnings disappear:

At some point, I had joined the Battleships back together with the original armada. Once I did, the extra Lightnings started showing up in the ocean instead: