Livereload not updating HTML, only when .ts is saved

Developing an Ionic 3 app on Mac OSX. I test it on an android phone using

ionic cordova run android -l

When I edit an HTML file & save it, the app refreshes but doesn’t show the update. If I then save ANY .ts file (whether I edited it or not), the app refreshes and shows the updated HTML.

Any idea why, or how to fix this?