Target industry output does not revert with same turn focus changes

[magnate]

Bug Report

Environment

• FreeOrion Version: 0.4.10.1
• Operating System: Win7
• Graphic card used: n/a
• Fetched as
  • Compiled from source

Description

When I change a planet from Industry to Defence focus, my Target Output for production goes down. So far so good. But when I change the focus back to Industry on the same turn, it does not revert to its former value, it keeps going down.

Expected Result

When I change back to Industry, I expect the target output to revert to its former value.

Steps to reproduce

• Select a planet with Industry focus. Note the Target Output for production.
• Change that planet's focus to Defence. Note the Target Output decrease.
• Change that planet's focus back to Industry. Note the Target Output again...

I cannot reproduce this with every planet in this game, only with one planet - Kilipi a. (Select player Magnate)
FreeOrion_0153_20210615_165459.zip

[geoffthemedio]

I'm unable to load thie attached save file. It appears to be in binary format when opened in a text editor, but v0.4.10.2 on Windows doesn't recognize it.

Since this is about v0.4.10, the issue was difficult to reproduce or at least was rare then, and I can't immediately reproduce in master, I'm going to remove this from the v0.5 milestone.