Ann: Voluntary Suspension Extension, page-14

Joint ventures are something that need to be discussed and agreed upon in detail.
When they initially went into a trading halt, they probably thought the terms would be agreed upon within a business day or so.
It is completely possible the other party or even MXC for that matter, wanted to clarify or discuss something important.
With everything shutting down Globally, it's is expected that process's and/or even effective communications are limited.
And seeing as COVID-19 is still relatively new (and rapidly escalating) news, it's not unreasonable for needing an extra few days to work this all out.
Especially with something as sensitive and important as a GLOBAL PANDEMIC!!

Remove emotion here and remain objective. I agree that it's poor form that they just keep suspending each day. They Should've just not mentioned anything until it was completed. But at the same time, I can see why this would be an announcement to be cautious of releasing too early.

GLTAH. DYOR. SANITISE AND STAY CLEAN!