Hi! I found a compatibility issue involving Rubia, Machine Upgrades, and Rabbasca Underground.

Biochambers disappear during underground warps even when placed entirely on lit safety flooring. Nearby assemblers remain intact. Disabling Machine Upgrades (which also requires disabling Rubia) prevents the issue.

The public source code suggests this interaction:
1. Rubia uses Machine Upgrades for its biochamber productivity bonus.
2. Machine Upgrades creates a hidden mupgrade-beacon with force = "neutral".
3. Rabbasca Underground destroys neutral entities during a warp.
4. Machine Upgrades then destroys the parent biochamber when its linked beacon is destroyed.

Could you investigate whether the hidden beacon can be removed or recreated without destroying the parent machine in this situation? I have also reported this to the Rabbasca Underground author.

Versions:
- Factorio 2.1.20
- Rubia 0.69.161
- Machine Upgrades 0.69.23
- Rabbasca 0.23.0
- Rabbasca Underground 0.11.1

I'd like to keep both planet mods enabled. Thanks for your help!

Quick update: Talon fixed this in Rabbasca Underground 0.12.1. Warp cleanup now removes resource entities and explicitly listed entities, so the hidden Machine Upgrades beacon is no longer removed during a warp.

No changes are needed on Rubia’s side for this issue. Thanks!