[JerseyWebTarget] QueryParam not complete encoded

Hello,

I have to report that I noticed that the WebTarget from Jersey Client (Version 2.37) is not encoding query parameters correctly.
We are using it to send a password and that is how we noticed, that something is happening. Currently, we encode the password before we set it as query parameters.

An exception is also thrown:
java.lang.IllegalArgumentException: Illegal character ";" at position 76 is not allowed as a part of a name in a path template "UserLogin=(MYLOGIN)&Password=%C3%98%C3%92%C3%8C%C3%A9%C2%A2%C3%A2%5Bi{ùÁe;ª3jË6ð1nLB/X¢.
Please notice that (MYLOGIN) is not the correct UserLogin and the correct UserLogin was replaced in order to post this issue.

Example:
- Plain password:
ØÒÌé¢â[i{ùÁe;ª3jË6ð1nLB/X¢
- From JettyWebTarget encoded:
%C3%98%C3%92%C3%8C%C3%A9%C2%A2%C3%A2%5Bi{ùÁe;ª3jË6ð1nLB/X¢
- From Java URLEncoder with StandardCharsets UTF8:
%C3%98%C3%92%C3%8C%C3%A9%C2%A2%C3%A2%5Bi%7B%C3%B9%C3%81e%3B%C2%AA3j%C3%8B6%C3%B01nLB%2FX%C2%A2

As you see, JettyWebTarget is not encoding the query parameter to 100%.

Please check and let me know if this issue was not opened in the correct forum. I also searched, but could not find another issue related to this problem.

Best regards