Hi @YaYaMoore - welcome to community.
To confirm, your Bluetooth speaker has an Alexa integration that you're using to connect to your Pandora account. When using this integration the songs cut off before the end?
Since Pandora isn't supported directly on this device I don't have any specific troubleshooting steps. However, I would suggest unlinking and relinking Alexa on your speaker, then try Pandora again.