When I add cycle modifier to y location of the foot, it is showing ok (maintaining bazier shape of the curve). However, when i do similar to the x location the bazier shape of the curve turns to constant. What am i doing wrong here, please?
I'm not sure exactly what you mean Judisak.
Can you post a video or images of the issue?
Please see screen shot of this problem below.
And this one is when without modifier.
That's a bug, Judisak.
Although, I cannot replicate it here with 2.82 or 2.9If you can replicate it on a new file it will possible to report it.