Ok occasionally buttons don't work

I used the MotoMaster 600 Lumens LED Work Light & Speaker, 2-pk
during my powder room mini makeover to listen to music and audiobooks while I renovated. The battery life is great and lasted the whole project!
The good: lightweight with a durable case. The light is decent and it's nice to have a dual function item.
The ok: pairing was easy the first time but you can only pair one speaker to a phone at a time. The dual speaker is only useful as dual lights as you can't play music from both at the same time. There is only one volume for pairing sound - LOUD although this is understandable on a noisy worksite!
The bad: pairing stopped working for one of the speakers and one button on one of the speakers intermittently which meant it stayed on without me knowing and turned off loudly late at night.
Overall it's a useful idea of a simple and durable speaker, I just wish the buttons worked reliably and if possible could be synced.