OK, so perhaps a slightly out of the ordinary situation
I've installed the free version, and dropped a dock on Monitor #2, with an analog clock on it. This works nicely until I open a fullscreen app on Monitor #1, at which point the clock stops updating.

This is better than ObjectDock (Drops off the edge of the monitor and is irretrevable without closing/ reopening for no reason I can discern, and no updates since kingdom come....), but still not quite right
Is this fixable or something I'll have to live with?

As a small additional request, I'd like to be able to increase the width of the hands a tad, but that's minor!

Cheers

Believe it or not, that's not a bug, it's a feature!

Seriously, it's a reminiscent of single monitor days and less powerful systems: when you're running a full screen application, 99.9% of the times it will be a game. As such, you want to focus all the system resources on making it run properly.

So, when Nexus detects a full screen application, it temporarily shuts down some parts of itself in order not to use unnecessary resources or interfere with it (so that if you bump a screen edge with your mouse pointer the game map actually scrolls instead of the dock popping up in the middle of it).

These days, with lots of people having multiple monitor systems, this is not always A Good Thing (TM) because the dock can actually be placed on a secondary monitor and, thus, still remain visible.

I don't think I've fixed it in v12.2, because, although I have 3 monitors, I keep the Shelf and all my docks in the primary, with only Xtreme's desktop modules/widgets going into one of the secondary monitors. Desktop modules in Xtreme know when they are hidden by a full screen app or not, so they always work properly.

For now I'm afraid you will have to live with it for a while since v12.2 is about to be released and changes are now locked (or give Xtreme a try and use the desktop version of the clock module instead).

It's not important, I've been living with worse for years
Windows gadgets & Rainmeter still update, so I'll just use one of those instead and move it off the dock.

(Yep, I've got a calendar gadget, CPU meter gadget, Rainmeter media player controls and a dock on monitor #2 as well as a whole load of crud!)

The dock not vanishing every time I open a fullscreen app is a distinct improvement.