Discourse-encrypt - Unable to see close message

After closing a topic, I sometimes like to edit the ‘close message’ to provide readers with an explanation of why the topic was closed. This works just fine with vanilla topics and messages, however I just noticed a bad interaction with discourse-encrypt:

Text for the benefit of search:

This is a secret message with end to end encryption. To view it, you must be invited to this topic.

I created the topic. I can see the OP and all replies. Just not the final close message.

Steps to reproduce:

  1. Create a new encrypted message. For the sake of testing, you can address the message only to yourself, however the problem is also evident on messages that are addressed to a larger set of people.
  2. Close the message.
  3. Click the pencil icon on the close transaction.
  4. Type a close message and save.