11/21/2019 - Just got a new Note 9 with Android 9, unlocked from Samsung. Device runs on T-Mobile and my issue described below occurs on both the cellular and Wifi networks in my home. The problem appeared to start this week and I didn’t notice it last week when I first got the phone. Very similar to issues found in this thread, but here is my detail.
1. Go to Play Store and install an app, any app (I’ve tried about 20 since the problem started).
2. For the most part, the app gets to 100% rapidly, 99% or lower on occasion. It then just sits there with the open button still unavailable.
3. If I go out of the Play Store, kill its process and relaunch it, he app icon appears in the app drawer within seconds and shows as installed in the Play Store if I search for it again.
The only time this process did not work is when I did not Google App disabled. In that scenario, the app just hung at 99%, it’s status in Play Store shown as “installing” but it never showed on the phone. I had to disable the Google App and restart, I then had the app on the phone.
I have tried every suggestion in this thread several times, in different orders, all failed.
Any ideas left to ponder with this?