[GNC] GnuCash 3.1-3 freezes when importing OFX file on Mac

[Brendan Simon]

I just tried GnuCash 3.1-3 on Mac, and it freezes when trying to import
a small OFX file (downloaded from my bank).  The cursor just turns into
a spinning beach ball and the app otherwise doesn't respond.

The OFX file imports just fine with GnuCash-2.6.21-2.

The OFX file comes from an Australian bank.  I thought it might be
related to the following bug, but the dates in my OFX file look to be
ISO format (YYYYMMDD).

https://bugzilla.gnome.org/show_bug.cgi?id=795347

Any ideas how to solve this?  Right now I'm stuck on 2.6.21-2.

Brendan.