Ever since the most recent Windows 10 update (1909) whenever I try to either shut down or put my PC into sleep mode, there's a rough 50/50 chance it'll actually do it. If it doesn't then it will lock my PC, show the login screen and just... sit there. Now since this update changed a few of my settings without my consent (apparently, my way of alphabetically looking at files and folders in the Windows Explorer needed reevaluating, as did my choice in image viewer; thanks, buddies at Redmond!) I immediately checked my Power Settings. However these have remained unchanged.
Turning to the internet for a solution isn't really helping either; there's a lot of dodgy websites offering, uhh, 'advice' (and dubious software to install), answers.microsoft.com seems full of 'independent experts' who just want people to reinstall all the stuff that wasn't touched in the update (or just Windows in general) and any answers here on stackexchange (sub)sites are all older then the most recent Windows 10 update which introduced the problem.
So fingers crossed someone over here knows the solution or at least shares in my pain. (Well, annoyance, mild discomfort and slightly higher electrical bill, really.)