title: My app works but log gives "No package ID ff found for ID 0xffffffff."
body: <p>I have an app that works fine on my emulators and on my own device. However, when I navigate between views I get the message </p>
  
  <pre class="lang-none prettyprint-override"><code>No package ID ff found for ID 0xffffffff.
  </code></pre>
  
  <p>all the time. I do not know what it means or where it comes from. </p>
  
  <p>Searching through the log I also find these messages:</p>
  
  <pre class="lang-none prettyprint-override"><code>I/low.wordscanne: The ClassLoaderContext is a special shared library.
  2019-04-10 16:25:10.984 26226-26226/? I/chatty:uid=10099(com.myapp.erikbylow.wordscanner) identical 2 lines
  2019-04-10 16:25:10.985 26226-26226/? I/low.wordscanne: The ClassLoaderContext is a special shared library.
  2019-04-10 16:25:10.992 26226-26226/? W/low.wordscanne: Unsupported class loader
  </code></pre>
  
  <p>and in <code>MainActivity - onCreate</code> I always get this warning </p>
  
  <pre class="lang-none prettyprint-override"><code>Accessing hidden method Landroid/graphics/FontFamily;-&gt;&lt;init&gt;()V (light greylist, reflection)
  2019-04-10 16:26:24.328 26226-26226/com.myapp.myname.wordscanner W/low.wordscanne: Accessing hidden method Landroid/graphics/FontFamily;-&gt;addFontFromAssetManager(Landroid/content/res/AssetManager;Ljava/lang/String;IZIII[Landroid/graphics/fonts/FontVariationAxis;)Z (light greylist, reflection)
  2019-04-10 16:26:24.328 26226-26226/com.myapp.myname.wordscanner W/low.wordscanne: Accessing hidden method Landroid/graphics/FontFamily;-&gt;addFontFromBuffer(Ljava/nio/ByteBuffer;I[Landroid/graphics/fonts/FontVariationAxis;II)Z (light greylist, reflection)
  2019-04-10 16:26:24.328 26226-26226/com.myapp.myname.wordscanner W/low.wordscanne: Accessing hidden method Landroid/graphics/FontFamily;-&gt;freeze()Z (light greylist, reflection)
  2019-04-10 16:26:24.328 26226-26226/com.myapp.myname.wordscanner W/low.wordscanne: Accessing hidden method Landroid/graphics/FontFamily;-&gt;abortCreation()V (light greylist, reflection)
  2019-04-10 16:26:24.328 26226-26226/com.myapp.myname.wordscanner W/low.wordscanne: Accessing hidden method Landroid/graphics/Typeface;-&gt;createFromFamiliesWithDefault([Landroid/graphics/FontFamily;Ljava/lang/String;II)Landroid/graphics/Typeface; (light greylist, reflection)
  </code></pre>
  
  <p>The app works at least on my devices, have anyone experienced something similar?</p>
  
  <p>I do use an <code>aar-module</code> imported from another project. Can that be a problem?</p>