The error message can not make your DAW unstable, basically you probably see "read_size==4" or something like that.
It happens because in the past the preset had been corrupted by the other bug.
Don't worry, you just ignore that, the only problem that this reveals is that some parameter value might be different from what you saved.
It will not make the plug unstable and even less the DAW. it is annoying just because it says that some data might be different from what you saved in the first place.
I'm sorry about this inconvenience.
Now if you have problems in your DAW, this must be for another reason.
BTW, cubase 6 does not support 10.5 and there is also a 6.0.7 update