Check out the comments of @App Store Connect Engineer’s reply above. They installed a fix so new uploaded builds will work. Others and I can confirm it does. For me deployment target 12.0 works on my iPhone 5s with App Store Release build (didn’t test builds for internal or development testing). Note it does not work if you install an .ipa locally, you need to upload the build for the fix to work.
Topic:
App Store Distribution & Marketing
SubTopic:
TestFlight
Tags: