Why does PL3 take about 8-10 seconds to come back when you switch away from it (via Command-Tab), then return to it? There is a very noticeable lag in the return, and if you are trying to do something quickly by going back and forth, it completely breaks the rhythm.
PL3 is the only application I have ever seen in all my years of Mac that does this. It does this every time, no matter which application you switch to (even the harmless Mac finder). And it didn’t start doing this until recently, some time after Build 29. It is REALLY annoying.
Mojave w/ 16 GB of memory.