I don't expect anyone to go through the hassle - but if you really wanted to see replies to messages that are currently are in some kind of limbo (hidden), then pull up a chair and follow a lot of steps.

1) First, open the thread you want to dig for hidden replies.

2) Second, above the first post in the thread is a banner.  Click on the three dots.

3) After you click on the dots, a list of the first page of replies will show in a list with short summaries of each post.   The first post is at the top and then all replies are in a "tree" below.  Third, click on the blue text summary of the message you want to read.

4) After clicking on this text a popup will appear with the message, full formatting, and any inline graphics.  I assume that actual file attachments won't show - but pictures that show up in the middle of a message ("inline" ) will show up.   Scroll up and down for longer messages using the scroll bar on the right.

5) Some message have lots of replies.  Not shown - but the bottom of the list of replies with summaries will have some mention of showing more results and you can click on that to get the next "page" of replies.   Sometimes there are many many pages. 

This is a sort-of workaround but certainly still a huge hassle.

Hoping for a fix soon.