Linkedin Share Button bad counting

Today i noticed that Linkedin Share Button doesn't show its counter for some article i shared some time ago, so the first thought was to check the developer page to find some news about the code used, but nothing seem changed.

As next step i shared another content to see if it works at least with new shares, the window pop up as always but the counter is updated after some minute.

The unique trouble seem to be with old shares and googling a bit i found this recent post: The answer by Jeremy Johnstone make me think that the problem is well know and developers are studying a solution, so actually i have nothing to fix on Service Links.