The issue has now cleared ;-)
I contacted Malwarebytes via their forum and they suggested I run their diagnostic tool to collect logs to send to them, I did not run any fixes with it. However, after I ran the tool, the intermittent connectivity issue cleared. The tech at Malwarebytes said the logs did not contain any info as I had uninstalled the main program, but he could only speculate on how the tool cleared the problem, perhaps a cache was cleared out or some network blockage was removed.
So thanks to them as one way or another, their quick response helped immensely.