I'm using a Samsung Galaxy J4 Core with Android 8.1.0 Go. When ever I want to download an app on Google Play, I first have to clear my data/cache for my Download Manager and restart my phone. It then takes a very long time to even start the download... I'm not sure why I'm getting this bug.
Edit 1: If I don't clear my cache and restart my phone, no apps will download/update. It will just say "waiting for download...". Before I even thought of clearing my cache, I waited 3 days for my download to start...
Edit 2: I have 6GB free on my internal storage (max. 16GB) and 2GB on my 16GB SanDisk Card. I have 1GB RAM, though for some reason, 560MB is used all the time.