This issue is observed with other System Macros like HTML Macro. Below are the steps to reproduce with the Info macro.

Steps to reproduce

1. Create a blank page;
2. Insert an Info macro and publish any information and update the page. Alternatively use the below Storage format:

   <p class="auto-cursor-target"><br /></p>
   <p><br /></p><ac:structured-macro ac:name="info" ac:schema-version="1" ac:macro-id="3387e4f3-a4d7-4126-9948-83681000af9e"><ac:rich-text-body>
   <p>Testing enabling and disabling system plugins</p></ac:rich-text-body></ac:structured-macro>
   <p class="auto-cursor-target"><br /></p>
   

3. Go to Cog icon > Manage App > All add-ons search for confluence-information-plugin and disable it;
4. Back to the page, we see Unknown macro: 'info' instead the information entered (expected);
5. Edit the page but do not touch the Info macro. Save the page
6. Manage add-ons screen again, enable confluence-information-plugin;

Expected behavior
The information is displayed back properly.

Actual Behavior
Unknown macro: 'info'  is displayed on the page and the data is lost. The macro was corrupted during the page edit/save while the Confluence Information plugin was disabled.
In the storage format, we see missing parameters in the macro structure:

<p class="auto-cursor-target"><br /></p>
<p><br /></p>
<p><ac:macro ac:name="info" /></p>
<p><br /></p>