Thank you for posting and welcome to the community. I'm sorry to hear you are having trouble using your Soundwear for calls with your computer and I would be happy to help with this.
We do have a handy guide for using Bluetooth speakers and headphones with computers that would definitely be worth reading. The information in that post may help you with this.
However, as you have mentioned that a reboot of the computer fixes this issue, you may find the issue is related to the Bluetooth module or drivers on your computer, at which point I would recommend reaching out to the manufacturer of your computer for further assistance.