I answered this correctly, but it was marked as wrong. The only thing that has changed is that I have just switched to Brave for my browser (though I am not convinced that was the cause). No other words had this problem (so far). I opened inspect console and there was one error about newrelic being blocked, which I would have expected given the nature of the browser.
I see this is a problem people used to have 5 years ago. Hopefully just a browser compatibility issue and not a regression.
I’d say the weirdest bit is is in the first pic, the mnemonic given was for the meaning and not the reading. It might be a once of error that you’ll never see again but I’d do a complete refresh, delete cookies and temporary internet files and all that jazz. Then if it happened again I’d email it in as a bug.
I might be mistaken but OP may have clicked the “display all information” button which would make the meaning mnemonic show up even though the question was asking for reading.