Issue
HTML type field is not showing some buttons as part of the TinyMCE toolbar. Also if the image button is not displayed, then images won't be displayed in the HTML field.
Resolution
Review if the following system properties exist in your instance:
glide.ui.html.editor.v4.toolbar.line1
glide.ui.html.editor.v4.toolbar.line2
Those properties customize the TinyMCE toolbar for all HTML fields, so please update them based on your requirements.
For more information, please review:
Customize TinyMCE attributes
