Update documentation

Software Guide/Bonsai.ONIX/Nodes/ONIContext.html

@@ -584,6 +584,10 @@ <h2>Configuration GUI<a class="headerlink" href="#configuration-gui" title="Link
 3rd-party devices, such as UCLA Miniscopes.</p>
 </dd>
 </dl>
+<div class="admonition tip">
+<p class="admonition-title">Tip</p>
+<p>Known issue: When the Passthrough radio button is selected for Hub B, no selector appears on either option making it seem nothing is selected, but the hub is actually in Passthrough mode.</p>
+</div>
 </section>
 <section id="settings-host-sync">
 <span id="bonsai-onicontext-syncsettings"></span><h3>Settings ➞  Host Sync…<a class="headerlink" href="#settings-host-sync" title="Link to this heading">#</a></h3>

_sources/Software Guide/Bonsai.ONIX/Nodes/ONIContext.rst.txt

@@ -112,6 +112,8 @@ ONIX-specific hub options such as access to raw deserializer data streams:
 :Passthrough: The hub port is configured to work with compatible
     3rd-party devices, such as UCLA Miniscopes.
 
+.. tip:: Known issue: When the Passthrough radio button is selected for Hub B, no selector appears on either option making it seem nothing is selected, but the hub is actually in Passthrough mode.
+
 .. _bonsai_onicontext_syncsettings:
 
 Settings ➞  Host Sync...