When the sources from a constructed inventory have global variables as per the example below, the variables are applied to all hosts referencing the settings from the last inventory source selected.

Inventory A: ansible_ssh_common_args: "-o ProxyCommand='ssh -W %h:%p -q root@proxyhost1'"
Inventory B: ansible_ssh_common_args: "-o ProxyCommand='ssh -W %h:%p -q root@proxyhost2'"
Constructed inventory: Inventory order 1.Inventory A, 2. Inventory B
Host A present in only in inventory A.
The ansible_ssh_common_args from Inventory B are used when connecting to the hosts

It would be great to implement an option to customize the behavior.

Suggestions:

• Allow users to apply the source variables only to the hosts that are from that specific source.
• Automatically move source variables to host level when syncing