Using "+" in name of selector hangs Webscraper

You can use the "+" character in the name of a selector, but if you do so then any attempt to edit the selector will cause Webscraper to stop responding. Restarting Chrome makes Webscraper start responding again,but you still can't edit it (though you can delete it).

Web Scraper version: 0.3.8
Chrome version: 72.0.3626.96 (Official Build) (64-bit)
OS: Windows 7


{"_id":"plus-sign-bug","startUrl":[""],"selectors":[{"id":"air+climate","type":"SelectorText","parentSelectors":["_root"],"selector":"span.scorecardFieldTitle:contains(\" in relation to Air & Climate?:\") + div.well","multiple":false,"regex":"","delay":0},{"id":"buildings","type":"SelectorText","parentSelectors":["_root"],"selector":"span.scorecardFieldTitle:contains(\" in relation to Buildings?:\") + div.well","multiple":false,"regex":"","delay":0}]}