Deploy docs

concepts/analysis_gotchas.html

@@ -220,6 +220,8 @@ <h2 id="notable-historic-events"><a class="header" href="#notable-historic-event
 <ul>
 <li><strong>May 20, 2024 - June 14, 2024</strong> - Excessive Glean database writes degraded Fenix performance on startup, pageload, scrolling, video playback, and possibly other areas. Some metrics were disabled. See <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=1892230">bug 1892230</a>.</li>
 <li><strong>Apr 18, 2024</strong> - Google began rolling out a new SERP experience on Firefox Android, which impacted standard search metrics. See <a href="https://docs.google.com/spreadsheets/d/16Cyx_KBieRdQkSBKolivqpBaK2H-VceN9LEZcL0snHg/edit#gid=0">the spreadsheet</a> for more details.</li>
+<li><strong>March 15, 2024</strong> - Spike in clients with null default search engine (~32%) for Firefox iOS. This issue was fixed for Firefox 126 and above. More details can be found in this <a href="https://docs.google.com/document/d/1iMoGOnTZZ920oth6aWbzD_npP79vSQq6OQx_bz4vFXw/edit">incident report</a></li>
+<li><strong>Feb 29 , 2024</strong> - Spike in the <a href="https://dictionary.telemetry.mozilla.org/apps/firefox_desktop/metrics/search_engine_default_changed">search engine changed probe</a> for users who had an engine update for versions &gt;= 124 . This is due to search engine default changed probes being triggered during engine updates even when users don't actually change their default search engines post-update <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=1876178">bug</a>. More details can be found <a href="https://mozilla-hub.atlassian.net/browse/RS-1051">here</a>.</li>
 <li><strong>Jan 15 - May 1, 2024</strong> - Legacy Telemetry pings containing os information from Arch Linux clients without the <code>lsb-release</code> package were <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=1875874">dropped</a>.</li>
 <li><strong>Dec 8, 2023</strong> - (ongoing) Firefox iOS Clients coming through the French ISP Netskope report an increased number of 4xx HTTP errors on submission (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=1870670">bug 1870670</a>).</li>
 <li><strong>Dec 7, 2023</strong> - Contextual Services data for Firefox Desktop versions 116 and up <a href="http://mozilla-hub.atlassian.net/browse/DSRE-1489">now supplied by Glean</a>.</li>

print.html

@@ -6109,6 +6109,8 @@ <h2 id="notable-historic-events"><a class="header" href="#notable-historic-event
 <ul>
 <li><strong>May 20, 2024 - June 14, 2024</strong> - Excessive Glean database writes degraded Fenix performance on startup, pageload, scrolling, video playback, and possibly other areas. Some metrics were disabled. See <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=1892230">bug 1892230</a>.</li>
 <li><strong>Apr 18, 2024</strong> - Google began rolling out a new SERP experience on Firefox Android, which impacted standard search metrics. See <a href="https://docs.google.com/spreadsheets/d/16Cyx_KBieRdQkSBKolivqpBaK2H-VceN9LEZcL0snHg/edit#gid=0">the spreadsheet</a> for more details.</li>
+<li><strong>March 15, 2024</strong> - Spike in clients with null default search engine (~32%) for Firefox iOS. This issue was fixed for Firefox 126 and above. More details can be found in this <a href="https://docs.google.com/document/d/1iMoGOnTZZ920oth6aWbzD_npP79vSQq6OQx_bz4vFXw/edit">incident report</a></li>
+<li><strong>Feb 29 , 2024</strong> - Spike in the <a href="https://dictionary.telemetry.mozilla.org/apps/firefox_desktop/metrics/search_engine_default_changed">search engine changed probe</a> for users who had an engine update for versions &gt;= 124 . This is due to search engine default changed probes being triggered during engine updates even when users don't actually change their default search engines post-update <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=1876178">bug</a>. More details can be found <a href="https://mozilla-hub.atlassian.net/browse/RS-1051">here</a>.</li>
 <li><strong>Jan 15 - May 1, 2024</strong> - Legacy Telemetry pings containing os information from Arch Linux clients without the <code>lsb-release</code> package were <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=1875874">dropped</a>.</li>
 <li><strong>Dec 8, 2023</strong> - (ongoing) Firefox iOS Clients coming through the French ISP Netskope report an increased number of 4xx HTTP errors on submission (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=1870670">bug 1870670</a>).</li>
 <li><strong>Dec 7, 2023</strong> - Contextual Services data for Firefox Desktop versions 116 and up <a href="http://mozilla-hub.atlassian.net/browse/DSRE-1489">now supplied by Glean</a>.</li>