It says 'recommended for all users' so I updated to 14.6 and gave it a go on my current project. It crashed (beachball) when I selected any amount of clips and then moved them in the timeline. Trashed prefs, rebuilt media cache, trashed BM driver, created new workspace and it still crashed when moving a clip. Rolled back to 14.5 which is at least usable.
14.6 is the least stable release I've experienced in 20 years of using Premiere.
nMP 2013 D700, Mac OS 10.14.6, media on QNAP shared storage, cache on external drive.
14.6 and 14.7 have multiple crashing issues relating to adding tracks and deleting sequences. Changing sequence settings (codecs) and other functionality have also been flagged by users. Staggering that these two iterations have been released and deemed usable. Some sort of checks must have nbeen performed but I see no evidence of that.
I am having the same issue, I thought it might have been hardware related but I have upgraded system specs well beyond whats required and still get consistant hanging when adding tracks, exporting & sometimes just simple editing tasks.