If you notice heavy lag while you use Bluetooth headsets during video calls (such as Zoom), it might be due to the bandwidth capabilities of the host computer's Bluetooth chipset. Typically, audio Bluetooth communication can take a large portion of the available data bandwidth, so you might see your mouse cursor lag or move in straight lines, or the keyboard lags when you press the keys.

To help lessen the lag, try reducing the number of connected devices working simultaneously on your computer.