URLs with only GET keys in query result in 404

[deepvision7]

Some sites expect query string only with keys and without values and generate 404 otherwise.
E.g. https://example.com/path?key1&key2 URL gets transformted into https://example.com/path?key1=&key2= by the proxy script and results in 404 not found error.

Also query key with a dot character inside gets transformed into underscore.
E.g. https://example.com/path?key.1 => E.g. https://example.com/path?key_1