Desktop entries with more than one period fail to "Make It a Launcher"

[accludetuner]

I was having issues adding Flatpak programs as launchers. Every time I tried to add a program as a launcher, it would disappear as soon as I closed the program, or logout/reboot. They wouldn't save.

An example is the program "Exodus" crypto wallet from gnome-software with the Flatpak plugin / Flathub repo.

The desktop entry created in ~/.local/share/applications/ is called "io.exodus.Exodus.desktop".

Thought maybe it was the capital "E", but renaming to all lowercase didn't fix it. Finally renaming it to just "exodus.desktop" made it work fine as a system menu item and a dock launcher. Any time I use a filename with more than one period, Cairo Dock will not add it as a launcher.

I found this page referencing the very same bug from 2018 on the Flatpak support page with no resolution mentioned:
https://github.com/flatpak/flatpak/issues/2474

It's not just Flatpak. It's every desktop file I've tried with more than one period, and Flatpak just happens to expose it.

Extra Info:
Debian Bullseye
XFCE 4.16
Cairo 3.4.1
gnome-software 3.38.1-1
flatpak 1.10.7-0+deb11u1