DOC: what's new for #15452

Author: toobaz

doc/source/whatsnew/v0.20.0.txt

@@ -748,6 +748,7 @@ Bug Fixes
 - Bug in using ``__deepcopy__`` on empty NDFrame objects (:issue:`15370`)
 - Bug in ``DataFrame.loc`` with indexing a ``MultiIndex`` with a ``Series`` indexer (:issue:`14730`, :issue:`15424`)
 - Bug in ``DataFrame.loc`` with indexing a ``MultiIndex`` with a numpy array (:issue:`15434`)
+- Bug in ``DataFrame.loc`` with indexing a ``MultiIndex`` with a list of missing labels (:issue:`15452`)
 - Bug in ``Rolling.quantile`` function that caused a segmentation fault when called with a quantile value outside of the range [0, 1] (:issue:`15463`)
 - Bug in ``pd.cut()`` with a single bin on an all 0s array (:issue:`15428`)
 - Bug in ``pd.qcut()`` with a single quantile and an array with identical values (:issue:`15431`)