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Undoing Grouped Unit Placement in Eden Editor Causes Unexpected Unit Respawn on Subsequent Placement
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Description

In the Arma 3 Eden Editor, there's an issue with the undo system when dealing with grouped units. If you place a unit, then place a second unit that joins the same group, and then undo the placement of that second unit, everything seems normal. However, if you then place a new unit attached to the same group, the previously undone unit unexpectedly reappears alongside it, as if the undo never happened.

Details

Severity
Minor
Resolution
Open
Reproducibility
Always
Operating System
Windows 10 x64
Operating System Version
22H2
Category
Editor
Steps To Reproduce
  1. Place down any unit
  2. Place down another unit, do it so they join the same group upon placement
  3. CTRL + Z
  4. Repeat step 2
  5. Experience bug (the unit you CTRL+Z reappears)
Additional Information
  1. Only the units themselves re-appear, if the unit swere crewing a vehicle, the vehicle will not appear, only the crew members.
  1. Despite the video showing a modded game, this issue occurs on completely separate setups including Full Vanilla + Linux x64 & Full Vanilla Windows 10 x64
  1. Dedmen mentioned some fuckery with undo

Event Timeline