Hope you doing well,, We have a problem of conflicting..
We have a share extension which also includes the LinkedIn share(Not from source Coast)..
We found that when we disable the plugn System - JLinked System Linked in share of the other extension is working..
Check the screen shot - when-disabled-works.png
When we enable the same JLinked plugin LinkedIn share is not displaying
[b]Check the screen shot - when-enabled-deactivates.png
I hope that helps,