We are using Login using LinkedIn through Kinvey MIC. All browser are working fine instead of IE-11 and Edge.
On Edge browser LinkedIn login option appears in popup but after authenticating with LinkedIn it will not redirected to the parent browser and ?code=somecode will be appeared in browser URL.
On IE -11 browser popup didn't appear it will open and just after that close in a few seconds without any interaction.
Please look for both the different behavior for LinkedIn login. And try the best solution to implement or resolved this ASAP.