Hopefully this is a simple question and I'm being a bit silly... but I can't find any particular reason for it...

See this picture, a hotspot area has been highlighted in blue.
It seems a bit odd that it is fractured and not continuous, but it's my lazy way of coding a simple chess move and attaching dialogue to it.
Unfortunately the upper square seems to work fine as a hotspot, with all the expected responses, but the lower square does not respond at all to anything.
The weirdest thing is that the two squares just next to them (where the bishop and rook are stood, above and below the horizontal band) are blocked in the exact same fashion and yet both squares work perfectly fine (i.e. they give the same expected response).
Please explain this to me, this game has taken much longer than it ought to have... (and if you do help, I will have something playable all the way through by the end of the bank holiday, and if you're really nice, I'll let you play it too!)

See this picture, a hotspot area has been highlighted in blue.
It seems a bit odd that it is fractured and not continuous, but it's my lazy way of coding a simple chess move and attaching dialogue to it.
Unfortunately the upper square seems to work fine as a hotspot, with all the expected responses, but the lower square does not respond at all to anything.
The weirdest thing is that the two squares just next to them (where the bishop and rook are stood, above and below the horizontal band) are blocked in the exact same fashion and yet both squares work perfectly fine (i.e. they give the same expected response).
Please explain this to me, this game has taken much longer than it ought to have... (and if you do help, I will have something playable all the way through by the end of the bank holiday, and if you're really nice, I'll let you play it too!)
