Strange fluid sim behaviour Good day. 

I found another member had the same prob twi years ago. Maybe someone can help me this time. 

THe prob is the following: 

I got (now) a simple setup with a bowl (acting as fluid->obstacle) and some water in it (fluid->fluid). The scene is surrounded by a cube (acting as fluid->domain). Last object is the camera.

I reduced my scene to only this four objects to reduce possible error sources.  

Now when I'm start the baking process, this is the first frame after the simulation starts: 


It is not my first fluid sim and I never had such a problem before. Setting are pretty much default. Any hints on this?
YES! I solved the problem. Thanks to sardipax! It was very simple: the normals ofc were facing inwards bcs. I created the water mesh from the bowl/glas. Flipping the normals solved this issue. 

Thanks for everyone who took care here.

Damned what a wasted night just because of such a simple mistake ... ;-)