API test TestWebKitAPI.WebAuthenticationPanel.SubFrameChangeLocationHidCancel is consistently timing out on EWS bots which are on Catalina 10.15.1 (19B88). It passes on EWS bots which are on Mojave and on build.webkit.org bots which are on 10.15 (19A603).
The test was added in http://trac.webkit.org/changeset/251295/webkit 3 weeks ago.
The test looks quite healthy on:
It was due to a configuration issue which started happening after updating the bots to Catalina. Sorry for the noise.