Error while running event LabIconRevert::on_robot_mined_entity (ID 68)
LabIconRevert/control.lua:14: attempt to index local 'tbl' (a nil value)
stack traceback:
LabIconRevert/control.lua:14: in function <LabIconRevert/control.lua:9>

What other mods are you using? Were you doing something special with that particular lab?

You could try /lir_reset which will reset the mod and should make this error go away. Though I'm not too sure how it happened to begin with.

It happened because I removed it using robots. Mining manually didn't cause issues.

I was using the Crash Site mod. I wonder if that caused an issue. It adds a Lab with a different appearance at the crash site at the start of the game.

I couldn't reproduce this so I'm not exactly sure what happened, but I did my best to fix what I thought the problem was.

I started a new save with your latest update, and tried to reproduce this.
It looks like v1.0.5 fixed it. Thanks.