Intermittent failure to display comments (desktop, firefox)

(crossposted to r/bugs)

When I click on the posting link in a subreddit, sometimes I cannot see comments, and even my avatar is blank because rendering of the page is never completed.

***Repeatedly reloading the incompletely rendered page finally results in a complete rendering.***

I think that confirms my theory that this is an (internal) intranet or server problem, probably unrelated to my system. FWIW, I am using Firefox 115.31.0esr (64-bit) on Windows 7. (No lectures, please.)

This misbehavior is relatively new. I first noticed it on or about Jan 7.

I have seen it in several subreddits.

For example: