Hi
Yes it will. The trigger will place the next lay as soon as all the trigger conditions are met. I'm sure the answer is in the trigger logs.
There can be other reasons, for example, Betfair may stop offering markets in-play during the game, the market_score may be inaccurate or not updated etc.
In response to your post I just wanted to test the trigger today and as far as I can tell it's been working OK.