AIRBRAKES "toggle" action only retracts airbrakes when triggered in KAL-1000
As the title says: when using a KAL-1000 to trigger the "toggle" action of the airbrakes, then this will only retract the airbrakes (if they were extended previously) but will not extend them if they are retracted.
The attached test craft will play the KAL sequence on action-1 and "manually" toggle the airbrakes on action-2. Pressing <1> will not extend the airbrakes, but will retract them if they were extended before. Pressing <2> will extend/retract the airbrakes as expected.
Tested with KSP 22.214.171.12494 and BG 1.2.0 on Linux