Options to strengthen Bluetooth signal?

Recently purchased the B50, and for the most part, I really enjoy it. I use it to push a pair of KEF Ventura 4s on my pool deck by connecting my phone through Bluetooth and streaming Tidal or Spotify. Manual says my Bluetooth tranmitter, phone), should be less than 10 meters, which it is, albeit through a window as I need my phone on me while on my deck. Everything works great 90% of the team but every once in a while, my connection gets garbled.

Any tips or devices I can use to strengthen my Bluetooth connection?

Hi Jeffrey and welcome to the forum.
Maybe try a Bluetooth repeater?