Impossible to pose a 3D model! Help plz - Animation and Rigging

Hi, I’m having a ton of troubles with the new blender 2.80 … but the worst bug / wtf that I’m experiencing is with the pose mode: As you can see in the pictures all my 3D models are changing pose and posittion each time I render, also if I swap to pose mode to object mode. In all the previous versions of blender I never had problems like that… Is this a bug or I’m doing something I can’t also apply the rig modifier because of all the shape keys of the model.

Everything You Need to Know About 3D Animation Rigs in 5 Minutes

3D Model Rigging: Particularities of the Process

Everything You Need to Know About 3D Animation Rigs in 5 Minutes

4 Top Rigged 3D Models for Animation

modeling - A pose or T pose? - Blender Stack Exchange

3D Character Modeling: Ultimate Beginner's Guide • 3D Studio

3D Animation: What is character rigging? How does it work? - Quora

4 Processing pipeline for model rigging from a body scan; from

Used blender pose library now mesh not moving with origin, and now