I have a tinyMCE instance on a doc type. I have set the TinyMCE datatype (Richtext editor) to include an icon for inserting a table by checking the associated check box. The tinyMceConfig.config file reflects this change by including this:

<command>
            <umbracoAlias>mceInsertTable</umbracoAlias>
            <icon>images/editor/table.gif</icon>
            <tinyMceCommand value="" userInterface="true" frontendCommand="table">table</tinyMceCommand>
            <priority>63</priority></command>

The tinyMCE now shows the insert table icon when I edit content. However... after a period of an hour or so the icon vanishes from the toolbar. The config file remains as above (despite the datatype NOT having a tick against insert table anymore). There's now a contradiction between the config setting and everything else.

I'm using Umbraco v7.3.4 on a load balanced server, but the admin side only runs on one server so I don't think it's related to load balancing.

Has anybody experienced this? Any ideas why the icon would vanish even though the config file says it is active? Any tips would be much appreciated.

Thanks