As talked in this thread https://forums.garmin.com/developer/connect-iq/f/discussion/277584/the-field-time-for-an-activity-session-on-the-homepage-disappeared , I found the field time disappeared recently. However that field for the embeded activities like running displays correctly. Is there a bug responsible for this issue?
You can try my app JumpJump https://apps.garmin.com/en-US/apps/dc6ceca8-6ec6-49f2-b711-4ebc0d347177 to reproduce this weird problem.