How do I change Talkback alerts about downloads?

After installing a TalkBack update for my mobile phone last year, Talkback announces every second that an update is downloading in the Google Play store. I am using Talkback version 7.1. This issue did not occur prior to installing Talkback version 6 but has persisted into Talkback 7. My phone is an LG Vista VS880, running android 5.1. I have the most recent version of Google app, Chrome browser etc. I already checked in settings, about phone to see if there is a system update for my device and there is not.