How to stop User Thumbnails from being N/A?

So say I used https://www.roblox.com/bust-thumbnail/image?userId=1&width=420&height=420&format=png for an image.

Occasionally it breaks and doesn't load the decal of the player(resulting in leaving a N/A on the image). What can I do to try and make it never go into N/A?

I believe something along the lines would be looking up the JSON of the api, and looking at the "Final" value. https://www.roblox.com/bust-thumbnail/json?userId=1&height=180&width=180 Final would probably be nil or false if the image wouldn't load, so keep refreshing until the bust thumbnail is finalized. There is no physical way to bypass roblox's image filter system, all you have to do is wait.