Entry with sub-entry using $PARENT_HOST$ variable doesn't pass through in RDM Jump

RDM 12.0.8.0 on local and remote system.

Remote system configured as jump box, agent is installed.

Bug 1:
Session is HTTPS and has a sub-entry that is SSH. HTTPS entry works properly and opens on jump box. The SSH sub-entry is using $PARENT_HOST$ variable for the host to SSH to. SSH sub-entry works correctly locally. If I associate that sub-entry with the remote jump box by selecting the session in the RDM jump screen, it opens the jump connection and opens the SSH connection which then fails:

"Unable to connect. Verify your settings. Hostname is invalid. Parameter name: serverName"

Assuming it's just passing $PARENT_HOST$ and not the actual variable value, but not really sure.

Bug 2:
If you choose "inherited" for the RDM jump type of the sub-entry, it doesn't appear to actually inherit from the parent. Parent will open on the jumpbox, sub-entry is still opening locally.

Bug 3:
With "prompt for comment on open (required)" and "prompt for comment on close (required)" selected in either session, it prompts twice. Once when you initiate the session to the jump server, and then a second time on the actual jump server itself.