I installed Elementary OS 5.1 (Hera) to share my existing /home partition originally created in Ubuntu 18.04.4 LTS.
I'm super pleased to be able to work out of the same home directory and discovering a few quirks like my desktop background setting getting clobbered.
Ubuntu uses a dynamic wallpaper and it clobbers Elementary's wallpaper setting (and vice versa). The specific entry from dconf in question:
There are settings in dconf that are ElementaryOS specific:
Is there a way to configure Elementary and Ubuntu to use distinct keys for its desktop background for example?
It totally makes sense that some people would want the same background and have a single shared key.
EDIT: the current workaround to avoid a null background is to use dconf Editor and set it to "Use default value" (which defaults to different values on boot for Ubuntu and ElementaryOS)
What I really want are two separate desktop settings for each install.