Dead Keys like Circumflex (AZERTY) doesn't work

The keys "^" on azerty or "`", " ' " on qwerty don't work because is waiting press on another key.

Edit:
This bug is encountered only on Linux.

 

I'm use Ubuntu 19.04.

I tested Unity 2018.3.7f1, 2019.2.0a7 and 2019.1.0b5.

Yes but project is private. I need your Gitlab pseudo to add you into project.

 

This is occured only on build make from Linux. On windows, it work. I send you the folder with multiple files :

• DeadKeys_Unity_Project.zip : It's the main Unity Project source to test
• Windows_Build_x64.zip : It's Windows build from Unity Project make from Linux
• Linux_Build_x64.zip : It's Linux build from Unity Project make from Linux
• dead_key_not_detected.png : Image to demonstrate problem with Dead key
• non_dead_key_is_detected.png : Image with non dead keys

This is also encountered on another Keyboard layout.

Attached Folder:

https://mega.nz/#F!P5ZhzYwZ!6AvPOK4fy6YzhB8jF3r3eQ

Edit:

On Windows it work also with build make on Linux with Unity 2019.2.0a4