Since updating ACF to 5.1.3, the get_field check no longer works as expected.
My template checks to see if a post is related to another and displays them if so using the relationship field.
<?php if (get_field('secondary_menu')) : ?>
<?php else : ?>
Do something else
<?php endif; ?>
This previously worked, but now has stopped.
I’ve tested to see if the values are getting pulled through using the below, and they are.
<?php $test = get_field('secondary_menu'); ?>
<pre><?php print_r($test); ?></pre>
Changing between Object or ID mode for the custom field has no effect on getting the check to work as before.
Doing some extensive testing on the above, I believe the issues is not ACF but part of the theme interfering which just coincided with the latest update.