Domain Mapping plugin breaks Multi-domain sites

The latest version of Domain Mapping plugin (4.2.0.6) causes the following redirect error on sites using the Multi-domain plugin:

The webpage at https://clas-math.uncc.edu/math-placement/ has resulted in too many redirects. Clearing your cookies for this site or allowing third-party cookies may fix the problem. If not, it is possibly a server configuration issue and not a problem with your computer

Reverting to Domain Mapping plugin version 4.2.0.2 fixes the problem.

WordPress 4.0

Multi-Domain 1.3.4.3

iThemes Security 4.4.23

We run both the front and back end under SSL using rewrite rules:

RewriteCond %{HTTP_HOST} ^www.(.*)

RewriteRule (.*) https://%1/$1 [R=301,L]