It looks like Browser On suspend/On resume are not being triggered as they were before. Functionality in my app that uses these seemed to stop working, so I've just done a quick test (in 191, pretty sure it was the same in 190 and 189) and built an Android Crosswalk app. It simply writes a webstorage value (current time) when suspended and loads it when resumed, and it's not happening when switching/backgrounding the app. It works fine when previewing in Chrome and just switching tabs.
Thanks.