Hue emulation, echo and long item titles

I created a group called “All But Living Room Lights” so that I can tell Amazon Echo to “Turn All But Living Room Lights off”. It doesn’t work though. In the log I get the following error:

[ulation.internal.HueEmulationServlet] - Item All_But_Lights does not accept Decimal, ON/OFF or String types

If I shorten the title of the group to “All But Lights” then it does work.

Is there a limit in the length of item titles somewhere?