Paste X-Flipped Pose Problem

I am learning basic walk, run animation. However I have a problem, previously I have been using Paste X-Flipped Pose function without a problem.

Now it is changing the pose in unusual way. I tried apply transform and recalculating rolls according to orthographic front view. I also tried previously working rigs they are having the same issue.

Could anyone help with the issue? Thanks in advance!