Not supporting ZWNJ in filename on titlebar

As illustrated in the following image, the character ZWNJ in filename is not show on titlebar. This character is widely used in Persian language (in not other RTL scripts)

image description

I couldn’t find where to report this issue so I sent it here

Please read this Introduction - Bugs and what it states about where bug reports should go to (but I’m not sure this is an error of your desktop manager, since window titles are a managed by the desktop-/window manager). Do other windows of other applications shows the same problem?

Tnx. I filed it here: https://bugs.documentfoundation.org/show_bug.cgi?id=131736

The link provided in feedback page for creating a bug report is wrong: Feedback | LibreOffice - Free Office Suite - Based on OpenOffice - Compatible with Microsoft

The link provided in feedback page for creating a bug report is wrong

why? it’s correct, and leads to the same page (only in guided mode).