Hi.
First point.
Some questions in help section mention plugin A or B (no one know all plugins, but they are available to search in dataview settings pane); but mentioning a snippet it’s another thing and can’t be described as something that everyone knows. 
The issue.
About the issue, I think the problem it’s the same if you use ![[image|200]]. So, to solve the “|” issue in markdown tables add "\" before "|", i.e. ![[image\|200]].
If this works with the “well known” Image Flags snippet… I don’t know.