Hello! My apologies -- I hadn't gotten around to trying this solution out until now.

I just did and it appears to have fixed the issue! VMs are booting correctly and I can interact with them normally through the console.

Can also confirm it works on both the 1.29 Dell FW from my original post, as well as the latest 1.32 FW available as of this post.

Much thanks @andyhhp and @stormi for both your time and effort in packaging this -- I greatly appreciate it!