Space between Sentences changed in recent update

Before my PC was rebooted for an OS update on the fifteenth, the space checking behaved as expected.  Since then, it is incorrectly adding grammar squiggles and pauses when checking where it should not.

In the proofing settings for this, I have (why is this panel not in dark mode? xD):

Current settings.

Which used to ignore quoted sentences such as:

A quote with uppercase follower.

However, you can now see a squiggle where one does not belong.  This happens with all "special ending" punctuation (question & exclamation) provided the following character is a capital letter.  (A full-stop in quotes should be followed by two spaces as a comma is used when ending followed by a "(s)he said.)

In other cases, if followed by a lowercase, it remains correct:

Quote and lowercase follower.

I changed nothing about my settings between the update and also tried with the latest one this morning (the 25th), but the problem persists.  This was also working correctly with mixed sentences before the update:

A mixed quote / sentence mix.

Here, we see a new sentence after the first question, indicating a bit of extra movement or, in some cases, a thought.  Again, this worked correctly before the update and has since started doing this.  I hate to disable this option because I sometimes forget to space correctly (or I am deleting stuff and remove too much, where the squiggle helps me fix it, as it should).  And no, I am not interested in a "how many spaces" fight.

The live support told me to post here to find an answer or get this fixed… I hope it helps in finding the change and reverting it back to how it should be.

Thank you.