According to this page, -> https://powerapps.microsoft.com/en-us/tutorials/share-app/
"You can share to a security group but not a distribution group" , I find that the sharing only locates my mail enabled security group, it cannot find the non mail enabled security group. Is this intended or is this a bug? We were able to share with normal security groups before but this must have recently changed as now it will not locate them. Any clarification would be appreciated, thanks!
Update: As well as the issue above, if sharing the app with the mail enabled security group, it will not actually give permissions to those within the security group, it seems like it explicitely assigns permissions to the security group's email as if that were a unique user.