Selecting the HW clock seems to fix the problem, I did try this as my first solution because it was obvious to try and get the time from the Real-time circuit, but I could swear it had some issues. Must have been some other mistake I fixed along the way.
Anyway, everything works as intended, thanks for the swift support with the command, it proved the time was set correctly just read from the wrong source.
You are right - there is more simple way to center a string than adding variable prefix and suffix.
All you need is:
Add a DisplayString into .svg file (Ctrl + L -> GENERAL -> Drag & Drop "DisplayString.svg")
Hit F8 (or select Text Tool)
Select the DisplayString and center the string:0_1584564636681_6403c868-bfdf-465a-9b80-02571bbdacab-image.png