layer inPoint problems after update to CC2014.2

Hi folks,

after the update to CC2014.2 I have problems with the correct starttime of some layers.

I write a script which generate project-files from a JSON with multiple compositions, textlayers, footage etc.
Now, when the script open one of the compositions to create the layers, they will created but the inPoint is false.
In other versions of AE incl. CC, the inPoint is usually 0, but now it has some strange values, which I cant explain to myself.

My first try to avoid the problem was to set the inPoint und startTime to 0 but in 2014.2 it wont help.

In older versions these changed the inPoint correctly.

Bug-Report was sent, but have anybody an idea how to solve these strange behavior?

myLayer.inPoint = 0;
myLayer.startTime = 0;