With the release of Minecraft 1.17, the problem was temporarily relieved. I was able to run the launcher several times in a row without resorting to manually killing it first. I briefly thought that Java 8 was somehow the catalyst for this bug. However, after a couple of days, it returned to the previous behavior of needing to be manually closed through Activity Monitor almost every single time. (Minecraft Java Edition 1.17, running Java 16 64-bit)
I added the current release of the launcher available on Mojave to the list of affected versions.
The launcher's log? Where is that located?
I have not had this issue since the release of Launcher 2.2.3964, can anyone else confirm?