Each document opens up in a separate window

Hi, since I installed Ubuntu 22.04 (but with the xorg instead of the Wayland window manager), LibreOffice has behaved erratically. Whether I create a new document from the menu or open an existing one, it insists on opening it in a separate window. The problem persists in all apps and file types.
My specs: Dell XPS 13 9305 (11th Gen Intel® Core™ i5-1135G7 @ 2.40GHz × 8, Mesa Intel® Xe Graphics (TGL GT2), Ubuntu 22.04 Jammy Jellyfish (64 bit, Gnome 42.0), xorg, LibreOffice 7.3 snap version.
Thank you in advance!

From my experience, this has always been the case. I have two computers under Fedora 35, one with Wayland, the other with X11 because of a Wayland-unsupported graphics card. And they both open documents in separate windows.

Please describe your previous behaviour. What kind of inconvenience do you see with separate windows?