After removal of a flatpak app data

i find that after delete of flatpak apps it does not remove the data of that app.
contain some data and cache files. is it a bug.

Report this bug here or check it on this page, if it’s reported

That isn’t a bug. Removing the flatpak shouldn’t remove the user data.

If you want to remove user data along with the flatpak use flatpak uninstall --delete-data