Cannot figure out why i have problem with sync GameObject

I am using a SyncPosition script instead of the NetworkTransform component as with the component sync is not working correctly. When i use the SyncPosition script the following happening:

1) From the Server/Client side sync. is working perfectly
2) On the Client side the object is hard to move. Ii is like a rubber band the object is moved only a short distance and behave like there is a rubber band connected.

Again, when using the NetworkTransform component all work perfectly.

Here is...

Cannot figure out why i have problem with sync GameObject