Multiple duplicate notifications + "Next" button not working
Every song sends 3 notifications (all identical).
Also, when mouse cursor is hovered over the notification bubble, and the "Next" button slides out below, clicking on it doesn't work.
Strangely enough, every 5th click on the "Next" button cycles through the windows open on the screen (kinda like Alt+Esc).
History: When Ubuntu 18.04 was fresh installed, Rhythmbox worked fine. One day I clicked the "Next" button, it didn't work and since then all these problems started showing up.