Dear rednax_de,
Thank you for purchasing LiquidLab. Also, please accept my apology for the inconvenience you have experienced.
Just to answer, your intelligence is not in question, it is one frustrating bug on Windows Phone 8 devices which makes the game unplayable
The bug is caused by an external toolkit that I have used, and this toolkit has critical bugs on WP8. Sadly, I didn't had WP8 device to notice and fix this bug sooner, thus it was reported by the users.
However, I'm in the process of fixing this bug. If you like, you can send me an email to liquidlab (at) live.com with subject "WP8". Once the bug free version is released on the market, I'll send you an email.
Sorry once again
LiquidLab