Accessing shared pdf via original file no longer popping up

I have most of my Adobe PDF files stored on SharePoint. When I want to share with coworkers I do so by opening the PDF in Acrobat, saving to adobe cloud storage and sharing the link thats created. 

I understand there is then essentially 2 versions of this pdf. The original PDF that is on Sharepoint and the shared version in the cloud that my co-workers now have a link to. In the past, up until about 2 months ago, I was able to access the SHARED file by opening the PDF on Sharepoint and a pop up would appear that said something like "there is a version of this pdf in adobe cloud storage, do you want to open this version of the pdf..." and I would click on that and the shared version of the pdf that has my coworkers comments in it would open. 

I know I can access the file by going directly to the adobe cloud storage but it gets a bit messy and its just a lot easier to know Im accessing the right file by starting with the version on SharePoint that gives me the pop up. 

Does anyone know why this pop up would not be showing up anymore? Or is there another way to do essentially the same thing, open original, get cloud version to open up...?

Help much appreciated!!!!