IK Bone issue

I am using a “Two bone IK” to hold the gun with left hand. It looks fine in the static pose.

But when I start walking forward, the left hand position changes all of a sudden.

Can someone please help me or give some ideas on how to fix this.

I appreciate your help. Thanks and Regards,

There is likely a bone in the chain, maybe the collar bone, that you are not overriding when you walk.

Possible, or the Ik is driven by an animation curve that isn’t present when walking.

OK. Thank You. I will check and fix it.

Yes. I am correcting the animation curve. Thanks for your suggestion.