[TYPO3-mvc] $query->like raises exception

[Steffen Ritter]

Hey folks,
I'm just trying a simple query->like('myProperty','test%');

and this results in the following exception:
#1217241834: Invalid variable name "title4b83bf2b24b2a" given to bindValue.

How to debug this?
Does anyone know the reason?

regards

Steffen