Shortcode issue

Hi there, I’m not sure if I’ve posted this problem in the correct section of the forum. I hope someone can help either way.

Am I Nearly There Yet?

I’m attempting to add some shortcode to the bottom of my posts. I’ve so far had sucsess adding the below code to my function.php file.

add_shortcode('stuart', 'stuartBotPost');

function stuartBotPost() {
    return '
        <div class="whoweare">
            	<img src="https://www.gravatar.com/avatar/b80039d3cf7dbfdf4d25130b06c08802.png" alt="mini Stu"/>
		<h4>About the author</h4>
            	<p>Stuart Edwards is the co-head Honcho at Am I Nearly There Yet?. He likes travelling, single malt whiskey, web design and all things techie. Not necessarily in that order. Read more about Stuart <a href="https://aminearlythereyet.com/authors">here</a>.</p>
        </div>';
}

add_filter('widget_text', 'do_shortcode');

That works fine. Now when I add another shortcode, it results in failure and the page fails to load.

add_shortcode('eloise', 'eloiseBotPost');

function eloiseBotPost() {
    return '
        <div class="whoweare">
            	<img src="https://www.gravatar.com/avatar/e44c4f6b5e6d25ff3ae8ef328c014099.png" alt="Eloise mini"/>
		<h4>About the author</h4>
            	<p><p>Eloise Rodgers is the co-founder of Am I Nearly There Yet?. When not seeking out the best local vegan cuisine, she's travelling the globe looking for it. She likes vintage things and making beautiful <a href="https://thehatqueen.com" target="_blank">hats and head pieces</a>.Read more about Eloise <a href="https://aminearlythereyet.com/authors">here</a>.</p>
       </div>';
}

Now, if I delete the bulk of the content within the <p> tags, it works. I’ve experimented a little bit. If I leave the bulk of the content the same as the [stuart] shortcode, it works fine! What’s that about?!

add_shortcode('eloise', 'eloiseBotPost');

function eloiseBotPost() {
    return '
        <div class="whoweare">
            	<img src="https://www.gravatar.com/avatar/e44c4f6b5e6d25ff3ae8ef328c014099.png" alt="Eloise mini"/>
		<h4>About the author</h4>
            	<p>Eloise Rodgers is the co-head Honcho at Am I Nearly There Yet?. He likes travelling, single malt whiskey, web design and all things techie. Not necessarily in that order. Read more about Stuart <a href="https://aminearlythereyet.com/authors">here</a>.</p>
        </div>';
}

Is there a maximum character allowance within the shortcode that causes this to fail?

Does the shortcode formatting have to be exactly the same as the shortcode above it?

I’m not a PHP whizz unfortunatley. I just can’t figure this out, seems totally bizzare!