Upvote:5
The simple answer is TALK TO YOUR EMPLOYERS LAWYERS immediately.
This is potentially a changing situation, but as it stands today if you leave the US as described you will NOT be able to re-enter the US until at least 2021, and likely several months into 2021 as you will need to arrange and attend an interview at a US consulate in your home country.
(Technically the wording of the Proclamation that stops you getting a new visa states that you are exempt due to being in the US on the date of the proclamation, however consulates are currently ignoring this fact and are not allowing H-1B interviews based on that exception)