Anyone knows why #gnome-software and #KDE #discover are so slow with #flatpak?

Like often when I'm downloading sth. I can't browse apps or they load for ages. Using the website works instantly.

It feels and is a lot more reliable to use flatpak from the terminal in my experience, I wonder why the #GUI stores have these problems.

Also often had long load times in those stores on #linux mobile.

Did you also experienced such issues? Are you a gnome/kde dev and know where it could come from?