When I make changes and save them, the app in my emulator is not being refreshed; the emulator is not connected to the metro server I think.
I tried to clear cache by running expo -r -c, but this didn't do any thing.
Did you try to enable the fast refreshing? I was having the same issue, but after I enable the "Fast Refresh" the auto refreshing started working again. To enable the fast refresh you just have to shake your smartphone and tap on "Enable Fast Refresh".