They are usually the quick at buying the dip and waste no time in making it public.
This time what went wrong.
Their reason for not purchasing this time could be linked to their last recent purchase of bitcoin worth over $2 billion, which was on the 24th of February, and the money used is said to be from a sourced loan; they probably may not have excesses to use and purchase more bitcoin; they are already close to their 500,000 bitcoin accumulation target.