Linux – google chrome. linux. XDG-OPEN keep asking me (forever) what to do with magnet links

(i'm on latest chrome beta (64) but it is happening in all the previous version of chrome i used.)

when i press magnet links in google chrome, i get this card:
Open xdg-open?

so i mark to always open these types of links… and then press open xdg-open.
now qBittorrent is starting to work. everything is OK.

but, if i press another magnet link, it again pop up this card and ask me what to do. it always do that and never save what i choose for later.

i have qbittorrent.desktop in /usr/share/applications

the beginning of qbittorrent.desktop is:

[Desktop Entry]                                           
Categories=Network;FileTransfer;P2P;Qt;                   
Exec=qbittorrent %U                                       
GenericName=BitTorrent client                             
Comment=Download and share files over BitTorrent          
Icon=qbittorrent                                          
MimeType=application/x-bittorrent;x-scheme-handler/magnet;
Name=qBittorrent                                          
Terminal=false                                            
Type=Application                                          
StartupNotify=false                                       
StartupWMClass=qbittorrent                                
Keywords=bittorrent;torrent;magnet;download;p2p;          

also in ~/.config/mimeapps.list i have this:

[Default Applications]                             
text/html=google-chrome-beta.desktop               
x-scheme-handler/http=google-chrome-beta.desktop   
x-scheme-handler/https=google-chrome-beta.desktop  
x-scheme-handler/about=google-chrome-beta.desktop  
x-scheme-handler/unknown=google-chrome-beta.desktop
x-scheme-handler/magnet=qbittorrent.desktop        

if i command xdg-mime query default x-scheme-handler/magnet i get qbittorrent.desktop result.

also if i command: xdg-mime default qbittorrent.desktop x-scheme-handler/magnet nothing is changed and problem exist.

last thing, if i open terminal and command:

xdg-open magnet:?xt=magnet-link-continue-here it opens qbittorrent with the link without a problem.