Escape characters not working on macOS

[my1e5]

Consider this minimal example where I want to print this string to stdout

\"hello\"

By escaping the characters appropriately, I can get this to work on Windows. However, it doesn't seem to work on macOS?
I'm using Max 8 and shell 1.0b3

Windows 10

macOS - Seqouia 15.3.1

MRE

<pre><code>
----------begin_max5_patcher----------
367.3ocoREsaBCCC74juhn7zlTGpsPQi8qrMgBsdPPkjpjTVmP7uuDmVFLUo
UM5CMxWry46rOQI7M5NvxYuvdkQHmnDBBE.H8wD9AQWYsvhowUvm5M64Iwqb
PmCgs6f55ATU6AcqqFbXI48nMBW4NoZ6ZCT5hTlWrbVZBKOcQ3X9bLHeVJ68
9ZhOi6qFHV.mmv3aDps7KoHqvFv2TOkcUCHUC7m0CZEGgp0977zuV3bF4lVW
T7jKhkzqjvS9PE7gns18HGu5LkN7+LMYh10AvZEagwclr+1YJRCGqxmfyLpi
rZTKI+9UxkIOTtSydK9wCdmdH3+J5rk2onK9SQikwqkpeu7icU.+VmvpaMkC
jNvA6mFqBrNoR3jZ00IEyYTydxDMEd7SYV1MDEEnno4HXr8Yib3Gp60lP3yI
XnTECKvPCbTNj+bDQX7iImeF0Zv9h2sbAOVptBLpVINUoA04oDWXTB+1RiHJ
Dbuhdl9Mda4BqA
-----------end_max5_patcher-----------
</code></pre>

Context

I have a CLI tool that outputs an 'escaped' json file as a single line to stdout. This can then be fed directly into dict.deserialize. This is working on Windows. But, I'm finding that on macOS the escape characters (which I'm using to escape the " and , characters) get stripped.