Finally convinced manager we need to use slack and it is down.

// Stupid JSON
// Tale of back-end ember api from hell
// Background: I'm an android dev attempting to integrate // with an emberjs / rails back-end

slack conversation:
me 3:51pm: @backend-dev: Is there something of in the documentation for the update call on model x? I formed the payload per the docs like so
{
"valueA": true,
"valueB": false
}
and the call returns success 200 but the data isn't being updated when fetching again.
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backend-dev 4:00pm: the model doesn't look updated for the user are you sure you made the call?
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me 4:01pm: Pretty sure here's my payload and a screen grab of the successful request in postman <screenshot attached>
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backend-dev 4:05pm: well i just created a new user on the website and it worked perfectly your code must be wrong
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me 4:07pm: i can test some more to see if i get any different responses
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backend-dev 4:15pm: ahhhhhh... I think it's expecting the string "true", not true
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me 4:16: but the fetch call returns the json value as a boolean true/false
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backend-dev 4:18pm: thats a feature, the flexible type system allows us to handle all sorts of data transformations. android must be limited and wonky.
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me 4:19pm: java is a statically typed language....
// crickets for ten minutes
me 4:30pm: i'll just write a transform on the model when i send an update call to perform toString() on the boolean values
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backend-dev 4:35: great! told you it wasn't my documentation!

// face palm forever