Bluetooth and Wi-Fi have shared the same frequency spectrum for a long time, which can cause the radio signals to interfere with each other. A little-known fact about Bluetooth is that the radio signals do not go through your body very well. An often overlooked source of interference is the common microwave oven. Microwave ovens also use the same spectrum as Bluetooth, but use a very high power signal that heats food. It is strange to think that the fluorescent lighting in your office could be a source of interference, however many newer lights actually emit a signal in the Bluetooth spectrum.
However, you can try these tips to reduce the garbled sound and interruptions when using Bluetooth headset:
Please, check this article for other steps to improve audio quality during a voice and video call https://help.brosix.com/audio-quality/