Firefox: My "@match https://*.meetup.com/*/rsvp/" never matches. Why?

[DanKaplanSES]

I'm probably doing something dumb here; some sort of typo I've become blind to. Here is my script header:

// ==UserScript==
// @name         Remove Meetup.com RSVP ad pop up
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  try to take over the world!
// @author       You
// @match        https://*.meetup.com/*/rsvp/
// @icon         https://www.google.com/s2/favicons?sz=64&domain=meetup.com
// @grant        none
// ==/UserScript==

The footer of some meetup.com pages looks like this:

When you click the Attend button on meetup.com (the red one on the right hand side), it redirects to a new page that ends in /rsvp/. But every time I reach that page, the plug-in acts like my script doesn't exist:

If I change the @match URL to // @match https://*.meetup.com/*, it works as expected. That is, it works correctly on rsvp pages, but it also runs on all the other pages that have no relevance to the script.

I've read both the TamperMonkey documentation and the Chrome Match Patterns documentation, and I can't find anything saying that there's something wrong about // @match https://*.meetup.com/*/rsvp/. So why doesn't it work as expected?

Here are two real URLs from the website that I would expect to match the @match field:

• https://www.meetup.com/silicon-valley-leadership-project-meetup-group/events/293476326/rsvp/
• https://www.meetup.com/bayaln/events/290685976/rsvp/

I'm using Firefox 114.0.1 (64-bit) on windows 10 and TamperMonkey 4.18.1.