Spacebar does not work for some of apps on my iMac Retina after update from Big Sur to Monterey

Thanks Karina. Your takeaway is not 100% the one that I intended to leave. The twist is that some keys fail to work correctly in some apps. Consistently. And I just tested with different keyboards & got the same result.

And while here checking responses, I saw the next and gave it a shot - to uncheck Full KB Access - and wouldn't ya know... Bingo. I'm trying to recall which app recently requested that and am not sure. But I think it might have been a Logitec app or update. I hope it was just so I could, as a reward for the pain, revel in the irony. Well, I guess it's not really irony when a Canadian shoots themselves in the foot. There is a high demand for podiatrists up there, I hear.

Thank you so much. That worked. I must be the only person to have that happen or my search skills need honing.

You fired off a very simple directive without preamble signaling it was something obvious. I just switched over a year ago from a lifetime of Windows. I would like to get a better grip on ... well, being able to see the obvious. I've always found that to be an unstructured and eternal exercise with any tech. But very interesting. Like I'm sure the wild west was interesting.