Issue after installing 14.5.1 update

Since installing 14.5.1 I have been experiencing connectivity issues. When playing Pandora, the music will stop playing and the bottom of the screen will read “Buffering….” Never have I received a “Buffering” indication before on this or any other iPhone I have owned. Additionally, when asking Siri to make a phone call she responds with “got it” and then says “I have experienced a problem. Try again later.” These issues have only occurred after the update. I currently have an iPhone 8 and had LTE with 4 bars of service each time the problem presented. Has anyone else experienced any similar issues since updating?