Hot tub Playing Music with No Stero Upgrade

I'm not sure why this is happening. I noticed it occurs more frequently in residential rentals, but not sure that's the actual cause. 

Note from EA_Solaire:

Hello all,

If any of you are still encountering this on the latest game version (without mods), would you be willing to share your save file(s)?

If so, please send me a private message with a link to the file. Instructions can be found here: https://forums.ea.com/idea/the-sims-4-bug-reports-en/information-how-to-send-user-files-to-the-sims-4-team/5048472

Thanks!