Got a weird one that I can't figure out...
On one existing project in particular, if I load a PC preset that I made, it loads with PC disabled, I have to enable PC, even though it was enabled before I loaded the preset.
On all other existing projects, it works as expected.
Now with new projects based on any one of my templates, when I add a new track, pro channel is disabled by default.
("Bypass FX Rack" and "Bypass FX Rack of this Type" are not checked)
What hotkey/how did I hit to enter this mode and how can I return it to standard behaviour of pc enabled when I add a new track?

Hi. My guess would be that you saved the preset with the PC turned off. (At least if it only on that preset, but it is probably not that easy)
When trying on my laptop, it seems to be down to which Template is used. On some of my projects it will enable PC when loading preset, and others not.
All the best.
Edit: This is consistent. 

Didn't save the preset with it turned off...
Wonder if this is a result of the last update.
Not a deal-breaker but rather annoying...