So I have been going through the log files and found this (this is from more than one log):
UI | INFO | 2021-06-25 14:33:36,895 | Launching project manager
UI | INFO | 2021-06-25 14:37:05,148 | Launching main window
Time difference: apprx 3m 29s
UI | INFO | 2021-06-25 14:45:37,003 | Launching project manager
UI | INFO | 2021-06-25 14:49:05,545 | Launching main window
Time difference: apprx 3m 29s
UI | INFO | 2021-06-25 14:55:02,295 | Launching project manager
UI | INFO | 2021-06-25 14:58:30,812 | Launching main window
Time difference: apprx 3m 29s
UI | INFO | 2021-06-25 14:33:36,895 | Launching project manager
UI | INFO | 2021-06-25 14:37:05,148 | Launching main window
Time difference: apprx 3m 29s
UI | INFO | 2021-06-25 14:45:37,003 | Launching project manager
UI | INFO | 2021-06-25 14:49:05,545 | Launching main window
Time difference: apprx 3m 29s
UI | INFO | 2021-06-25 14:55:02,295 | Launching project manager
UI | INFO | 2021-06-25 14:58:30,812 | Launching main window
Time difference: apprx 3m 29s
And so on.
The time from program manager UI appearing and main Resolve (project) window UI appearing is nearly exactly 3 minutes and 29s in EVERY case!
I don't know what to make of it.
Also I should mention the program manager UI isn't frozen, I can click the menus, right click works, I can expand the database sidebar. It's that program manager UI remains for 3 minutes and 29 seconds.
I appreciate all the answers, thanks!