Yep. I've seen this happen to another startup. They leased a massive (for them) office space only to shut down a few months later after a funding round fell through horribly.

A few months later is a lot different than 4 days later.

Big office deals take a long time to start, and have inertia once they're going. I can easily see someone starting a moderately speculative office expansion project and then getting distracted with fundraising, only to have everything fall apart at the same time, many months later.

Said another way: given the number of liabilities at a company that has taken hundreds of millions in funding and is flying low over the ground, a lease is probably not you biggest concern.