I’m not sure if it relates to the caching performance, but the fetch column might refresh periodically and if your users access the app at the time it is recalculated, the image might appear empty at that specific time.
No, it wouldn’t change. By action do you mean the action editor? I’m not sure how it fits into my flow. Or would I need some kind of boolean that would flip once the value was written to a static column and then no longer allow any new values to be rewritten to it?
I mean let’s say you show each row in an inline list, then when the user wants to access the details view, theoretically you can add a “set column” action to set the fetched image link to a normal image column so it’s written in stone and won’t change even if the JSON changes.