The temporary workaround can be found here : Get Submitted JobID - Python - Deadline - AWS Thinkbox Discussion Forums (thinkboxsoftware.com)
eg deadlinecommand.exe -SubmitMultipleJobs -dependent -job main.job main.info main.mb -job dependent.job dependent.info dependent.mb
Unfortunately, this means that SubmitMultipleJobsV2 still isn’t suitable for job submissions that require any form of dependencies, so I’m hoping someone at AWS (@zainali ?) can report in on any progress in implementing a bug fix. This thread will be celebrating a 2yr anniversary soon 
We’d love to use SubmitMultipleJobsV2 as it appears to be considerably faster to submit with than any of the other available methods, but in its current state, it’s not functional.
@zainali Could you also put an internal ticket in to update your documentation with reference to this limitation. I’m sure I’m not the only one that’s wasted time implementing this method only to find it doesn’t work as described.
See : Jobs - Command Arguments — Deadline 10.3.2.1 documentation (thinkboxsoftware.com)
“SubmitMultipleJobsV2 allows the submission of complex dependency structures” 
Thanks!