When multipath failed the resize, it was still thinking it had the larger size internally. Thus, when the second resize command happened, it through that it had nothing to do, and returned success. I've made it reset it's size internally, when the resize command fails.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.