Sheriff-o-Matic for Clank is currently listing two separate failures:

Android Tests (dbg) step failure
Active for: 5h 41m 45s
Instrumentation test chrome_public_test_apk failing on chromium.linux/Android Tests (dbg)
Examine
LINK BUG
SNOOZE
Builders this step failed on: Android Tests (dbg) [5 in a row]
Instrumentation test chrome_public_test_apk
chromium: 398198 - 398255

Instrumentation test chrome_public_test_apk failing on 6 builders
Active for: 7h 44m 34s
Jelly Bean Tester, KitKat Tablet Tester, Lollipop Low-end Tester, Lollipop Phone Tester, Lollipop Tablet Tester, Marshmallow Tablet Tester
Examine
LINK BUG
SNOOZE
Builders this step failed on: Jelly Bean Tester [3 in a row]  KitKat Tablet Tester [3 in a row] Lollipop Low-end Tester [3 in a row]  Lollipop Phone Tester [6 in a row]  Lollipop Tablet Tester [5 in a row] Marshmallow Tablet Tester [3 in a row]
Instrumentation test chrome_public_test_apk
chromium: 398156 - 398255

But not only do these affect the same test suite, they actually involve exactly the same list of failing tests:
org.chromium.webapk.shell_apk.DexLoaderTest#testPreviouslyLoadedFromLocalDataDir
org.chromium.webapk.shell_apk.DexLoaderTest#testLoadFromRemoteDataDir
org.chromium.webapk.shell_apk.DexLoaderTest#testLoadFromLocalDataDir
org.chromium.webapk.shell_apk.DexLoaderTest#testLoadDifferentDexInLocalDataDir

as can be seen be comparing the two links that Sheriff-o-Matic provides:
https://uberchromegw.corp.google.com/i/chromium.android/builders/KitKat%20Tablet%20Tester/builds/4418/steps/Instrumentation%20test%20chrome_public_test_apk
and
https://uberchromegw.corp.google.com/i/chromium.linux/builders/Android%20Tests%20%28dbg%29/builds/34742/steps/Instrumentation%20test%20chrome_public_test_apk

Presumably the reason they are listed separately is that one is in the chromium.linux waterfall, and the others are in the chromium.android waterfall. It would be nice if these could be combined into a single entry.