I'm using addthis share plugin, however the share buttons are now visible under every toolset custom field being called to the site by elementor page templates.
I just checked by installing the Elementor and Elementor pro and build a single template using Elementor to display single post for my student post type.
I've also installed the plugin "Share Buttons by AddThis" and added the one entry "Inline share buttons" to display share button and activated the same setting as per your site but when I try to display the single post that is displayed using single elementor template I do not able to reproduce the issue:
=> hidden link
- As you can see it displayed two custom field successfully.
Here is the site access: hidden link
User: demo
pwd: Admin@999
This is the single elementor template used: hidden link
I have found a work around and will continue to look at the issue on my side, Do you mind leaving the demo site up for a few days just for me to have a look at some of the settings on yours.
The site I shared with you is brand new test site where only Toolset plugins and woocommerce plugin is active. I will check this later and see if I am able to reproduce the issue you shared and if found i will report it in front of our Dev but currently that is not the case.
You should keep using workaround and you can also share workaround you use here so other user may benefit if they run into the same issue.