James —
I found the problem; it was in the template.
I was using the generic WordPress function for calling the value of custom fields, which apparently works with just about everything but the wysiwyg editor. I employed this form:
<?php echo get_post_meta($post->ID, 'text', true); ?>
instead of
<?php the_field('text'); ?>
Once I changed it, everything worked fine.
So always assume an ID 10t error when something like this occurs. Thanks for all your help; sorry to have been a time-waster.
