Somehow both my two Macbook Pro (2018 13-inch with High Sierra and 2019 13-inch with Catalina) have been experiencing bluetooth connectivity issues for several months. All of a sudden, all bluetooth devices disconnect for a few seconds then recover. This could happen dozens of times a day and really disturbs productivity. I have tried numerous solution mentioned online like restarting SMC, reset bluetooth module, etc and none of them works. Finally, found this article. Turning of “Handoff” feature works for me.. (System preferences -> General -> uncheck “Allow Handoff between this Mac and your iCloud devices”) You can read more in the article. Basically “Handeoff” allows you to coordinate between your iCloud devices, which I have never tried.