It was probably more that it was quite an intensive program that was being run. I'm not sure but could anyone else confirm if programs like Bitcoin core and nicehash also get blocked in a similar way?
They told us it was because it is a Trojan, which it isn't. In general, all AV will block anything that mines because it has the potential to be used maliciously (without the user's knowledge). I don't believe that can be said of the way the miner was implemented on our site.
The latest is that they have agreed to review the block.