New Blog Templates makes lighboxes go crazy

I'm using MadebyMinimal themes 'Eames' and 'Wright,' and a configured Eames site as a new blog template. If, in a site made from that template, I switch to the Wright theme, it's lightbox galleries fire off in a rapid loop.

Could my settings be causing this? Using Wright as a template, then switching to Eames, works without a hitch. Eames has no lighboxes.

OK to take a dashboard view if need be. Thanks.