Please make sure you're using the latest version of any of the major browsers like-Opera, Firefox or Chrome and your desktop version is working fine.
Some screenshots may be helpful for us to understand your issue better.
I have checked with our demo site of eShopper and Dokan default theme. Everything is working fine there.
We are not creating anything on the shipping section, we have just placed the shortcodes. This issue could be because of plugin conflict or you might have written a conflicting function.
You may restore the default theme and see if the issue remains.