Similar, but not identical to others. Crash occurs when bot attempts to remove balancer marked for deconstruction.

Error while running event belt-balancer-2::on_robot_mined_entity (ID 68)
belt-balancer-2/objects/part.lua:215: attempt to index local 'belt' (a nil value)
stack traceback:
belt-balancer-2/objects/part.lua:215: in function 'remove'
belt-balancer-2/control.lua:145: in function <belt-balancer-2/control.lua:134>

Manual remove:

Error while running event belt-balancer-2::on_player_mined_entity (ID 69)
belt-balancer-2/objects/part.lua:265: attempt to index local 'belt' (a nil value)
stack traceback:
belt-balancer-2/objects/part.lua:265: in function 'remove'
belt-balancer-2/control.lua:145: in function <belt-balancer-2/control.lua:134>

+1
The mod Belt Balancer 2 (2.0.9) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event belt-balancer-2::on_player_mined_entity (ID 69)
belt-balancer-2/objects/part.lua:265: attempt to index local 'belt' (a nil value)
stack traceback:
belt-balancer-2/objects/part.lua:265: in function 'remove'
belt-balancer-2/control.lua:145: in function <belt-balancer-2/control.lua:134>

Error at remove (by hand, bot or whatever thing), got and crash

The mod Belt Balancer 2 (2.0.9) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event belt-balancer-2::on_player_mined_entity (ID 69)
belt-balancer-2/objects/part.lua:215: attempt to index local 'belt' (a nil value)
stack traceback:
belt-balancer-2/objects/part.lua:215: in function 'remove'
belt-balancer-2/control.lua:145: in function <belt-balancer-2/control.lua:134>