"Too many chars in chunk size" error on some websites

[Shnatsel]

On some websites, e.g. http://economicinclusion.gov, hreq fails with the following error:

Too many chars in chunk size

Firefox and curl work fine.

39 websites out of the top million from Feb 3 Tranco list are affected.

Tested using this code and this Cargo.lock. Test tool output for all occurrences: hreq-too-many-chars-in-chunk-size.tar.gz