Blender 2.9 keeps crashing

For me 2.83 was very stable. Never crashed. After 2.9 crashed sometimes and 2.91 is unusable. Mostly happens when changing from Perspective to orthographic. Sometimes you cannot select an object and not much later crash. My PC is a i7-7700k, 32GB, gtx1080 and WIndows 10. I tried updating the graphics driver. Still the same. Trying now 2.83.12.