Lazy La: Unable to release line locks

[moblet1]

At Lazy La, AI from neighbouring boxes sometimes asks to send trains on the left mainline track, or asks to send trains on their usual track if the mainline track direction has been reversed. I have not been able to release the line locks on tracks 1 & 2, there is no response from the "release line lock" button.

[moblet1]

I just had the same problem at DGZ. Lazy Lc AI requested to send a train on track 4 but I was unable to release the line lock. (The train was sent on track 1 instead.)