Thanks for the additional information. Unfortunately, the connection problems have returned and I haven't made any progress in solving them. When I kill the pulseaudio process, it simply restarts itself and I'm unable to stop this behavior, so I therefore can't run it manually with the -vvv to further trace the Bluetooth issue. I have followed everything I found online, including the steps from the PulseAudio page in the Debian wiki[1] but nothing seems to work.
I found instructions yesterday to enable PA debugging by adding "-d" to its startup options and setting a specific log file. It worked (I got output to the file) but it didn't log anything during my subsequent Bluetooth issues.
Thanks,
Dave