In case of network issues, ews-app can stop fetching patches from Bugzilla. It's because the exception is not handled in the fetch loop, and the loop exits. See <rdar://problem/47369502> for more details.
Created attachment 359731 [details]
Comment on attachment 359731 [details]
Clearing flags on attachment: 359731
Committed r240303: <https://trac.webkit.org/changeset/240303>
All reviewed patches have been landed. Closing bug.