Here are a couple of screenshots to illustrate the issue:


Moodle 3.10.1+ (Build: 20210226)
Hi P H (what a strange user name)
It's obviously impossible for us to answer your question from that screenshot. Please export and attach the XML file of that cloze question to your next post so we can examine it.
Thanks for you reply with the attached question, "P H".
Found the culprit, a classical case of invisible newline break. I suppose you first typed your question in a word processor or text editor outside of Moodle and then did a copy-paste into the Moodle cloze question editor? Anyway, this is how I managed to find the problem.


Conclusion. To prevent such happenings, my recommendation is to never ever copy-paste question texts from a Word Processor/Text editor outside of Moodle into Moodle. Or, if you do, to always go into the HTML view to check for unwanted imported format tags. Some of those tags are easily detected, other, such as the infamous invisible line breaks are less so.
Dominique "... and real photos"
Is that a stone in my garden? My avatar was designed by my daughter Cali and I find it a much better visual representation of my inner self than any "real" photograph could achieve. Here's a link to another "digital painting" she made of me a few years ago.

Manufacturer's and merchants' copyrights: This clock is for sale on multiple websites.
There is also the fact that the Atto editor "newlines" the text after about 255 characters when it is in <p> and <div> tags. That's okay if you stay in Moodle but as soon as you copy the code somewhere else, into any other editor, and then bring it back into Moodle, those new lines become hard line breaks and we have the OP's
problem.
Newlining the text after 255 characters when it is in <p> and <div> tags may be a reminiscence of the past or a simple oversight, but can arguably be considered a bug of the Atto editor. Or maybe there is a good reason for this, which I don't know.
...
<br>
<span>
Text and sub-question(s).
</span>
<br>
<br>
<span>
More text and sub-question(s).
</span>
<br>
...
Hello P H, Joseph and Visvanath,
I think that's it: Short answer sub-question cut by Atto ↗
Tracker: Atto inserts a line break every 255 characters ↗Well, I have always gone by my initials and I think I'll continue using them even if "we" may prefer otherwise.
I can assure you though that I am real.