Okay, so it's now tomorrow and I've now discovered that with "Fast boot" and hibernation disabled.
Waking up from sleep mode
Full reboot
On one hand I might just have to get used to shutting my PC all the way down at night, which is kind of inconvenient but at least I know it stops the problem.
On the other hand, if you have any quick suggestions about something else I might be able to do I'll take em ¯\_(ツ)_/¯.