Unit move during attack selection screen

[alberic89]

Game and System Information

• Version: 1.18.0/master
• OS: GNU/Linux (Debian 12)
• Installed with Flatpack

Description of the bug

When you select a unit and click another unit who is not near to him to attack it, the first units will be teleported next to the second during the attack selection screen.
Maybe a video is more clear:
Capture vidéo du 2024-04-10 17-10-00.webm
Normally, you can't see it because the unit is centered on the screen, but if you place you in a corner, the bug will appear.
It is maybe an old bug, but I don't found it in the issue tracker.

Steps to reproduce the behavior

1. Be on a corner of the map,
2. Attack another unit,
3. See.

Expected behavior

Normally, the unit will not move until the attack selection is complete.

Additional context

No response

[Pentarctagon]

I wouldn't say it's intention, but yes it's a known side effect of the rendering overhaul that was done in 1.17. The change isn't that the unit is now moved next to the unit it's attacking - that was actually always the case - the change is that now the screen is updating to show that it's happening.

[Wedge009]

So I understand correctly, this is the same situation as #6960? (Although that one focused on the fact that the unit image was missing, not that the unit behaviour has changed.)

[Pentarctagon]

That issue was that the unit's image was missing entirely (or blinking if it was over an animated terrain or had a standing animation). The resolution to that issue is what causes the behavior in this issue.

[Wedge009]

Combining #3795 into this one. The ellipse associated with the moving unit no longer displays since at least 1.18.0. I think that's okay, but if this issue ever gets resolved by restoring the previous behaviour of the unit not being shown as moving, I think the ellipse associated with it would also be shown.