Matcha doesn't load the edited version of a file in Dropbox edited on both Matcha and an OS X editor.
How to reproduce:
Open the Dropbox file in Matcha
Edit the same file on OS X
In Matcha, use the down arrow to close the file
Slide towards the right to show the Dropbox folders, and press the syncing symbol
This updated the time of the file showing it has been synced (or has it?)
Tap the file to reopen it in Matcha, it's still the previous version
One workaround, appears to close the file, open another file, and then reopen the file we were working with.