Everybody I know that plays Ghost Recon Breakpoint on Stadia have lost their game save. I can't see any information regarding this issue so you need to put this up there and give us a status report like you have with Roller Champions. I don't know if the issue is on your side or on Google Stadias side but it needs attention to be resolved. 

@mauzil75 For Stadia you have Google Takeout. Have no idea how relevant this is for the ongoing problems. You will get some files but I'm not sure if the data is the same as on the ubisoft servers.

Everybody I know that plays Ghost Recon Breakpoint on Stadia have lost their game save. I can't see any information regarding this issue so you need to put this up there and give us a status report like you have with Roller Champions. I don't know if the issue is on your side or on Google Stadias side but it needs attention to be resolved.