Plus sign "+" is not handled properly when passed in the URLs in iOS

[ghevge]

Describe the bug
Plus sign "+" is not handled properly when passed in the URLs.
I noticed that when I pass the plus sign in a URL, if it is not escaped, if it is escaped a single time or if it is escaped twice, the plugin is passing it to the upstream as unescaped: "+"

This is causing problem on upstream, where it is processed as an empty space.

If I escape the plus sign 3 times, the plugin will pass it over as double escaped: "%252B" which again is not OK as I will read "%2B" on my server side.

Any idea what is going on here?

Thanks

To Reproduce
Pass "%2B", "%252B" and "%25252B" as params in a URL through cordova-plugin-webview-proxy in iOS.

Expected behavior
the proxy should allow passing the "%2B" as a parameter to upstream servers.

Logs
not available

[ghevge]

If i remove the following 2 lines from the ios code, and pass in an escaped url, everything works ok

startPath = [startPath stringByRemovingPercentEncoding];
startPath = [startPath stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

Something is getting messed up during re-encoding