Right Roku Wireless Speaker Rattle

I’ve noticed a couple months after purchasing my Roku wireless speakers, that my right speaker rattles when there’s deep bass on a television show or a movie. I initially thought it was due to the glass and metal table that the speaker sits on, however, I recently picked up the speaker in my hands and the issue persisted. I tried performing a factory, reset several times of both the television and the speakers, however, I am still experiencing this issue. Can someone please assist? Are these covered under any type of warranty?

Tony