Modification/deletion of group isn't propagated to server

Observed behavior

I have event control block regulary turning group of batteries on and off. I removed some batteries from the group. They still turn off and on. I have deleted entire group. Batteries still turn off and on. I have relogged to the server. Issue is still happening.

Where it was reproduced

Official Keen server NA#1 - can replicate at will.

Doesn't replicate in singleplayer.

Steps to reproduce

• Make event control with battery, some lights and any block for control event control, such as thruster.
• Put lights into group `lights group`
• Set event control to
  

• WHEN "block on/off switched" = thruster
  THEN (action 1 slot 1) "lights group" -> switch on
  

  ELSE (action 2 slot 1) "lights group" -> switch offTest it few times
• Now remove some lights from the group by resaving the group with less lights
• take a close look that lights are indeed not in the group
• Switch thruster on/off, lights that were previously in the group will still switch on/off
• Remove the group completly
• Switch thruster on/off, lights are still impacted

Additional info

Upon doing a blueprint and close look, BP seems to be setup correctly.

I suspect this is problem with propagation of group modification to the server or something like that. Doesn't seems to be a desync bug, since relog didn't help.