Thread:Extension talk:Maps/ display points does not accept external URLs with equal-sign (=) in it

Currently I am trying to update an old Wiki (with Maps 0.7.7) to the latest versions (Wiki 1.22.7 with Maps 3.0.1). I am stuck, because this will not work any longer:

If the link does not contain the special character =, everything works fine. With the special character, the POI's icon does not appear at all. Using the short URL (without the title=) does'nt work for me.

BTW, the  Tag does not work at all for me with Maps 3.0.1

I didn't find the part of Maps-software which processes the URL, so I couldn't try any work-around. Please hel me.