Part of me wonders if you have a corrupted section of iOS causing this issue, but that would be weird for it to only impact Scriptable widgets
And you said it doesn’t matter what widget you to to load, right? Even if you disable all the other scriptable widgets, then have a very basic one added to Home Screen?
What’s strange, is on 14.8 with the latest app updates, the colors don’t show on the loading page of the widget like you shown in that screenshot, unless it is small size.
I’ve tried another phone running IOS 15 set up as a new phone so not restored from a back up or data transferred from another phone. I downloaded Scriptable and added one widget, this has also failed to up date in more than 12 hrs
Just curious, what widget is this? does it affect just one Scriptable widget or any Scriptable widget? I tend to agree with @schl3ck that it could be a memory issue on the specific widget. Unless of course it happens to all your Sriptable widgets.
You can try creating a simple widget that just displays short text.