Custom Post Types about tablepress

[TobiasBg]

TablePress by default adds the its code for the "Table" button on the "post.php" and "post-new.php" pages, which are the pages used for CPTs.
I'm using another plugin which uses a CPT and I have no issues with the "Table" button missing on its "Edit" screens...

[whatthefork]

So try it via WooCommerce editing a product ( CPT: product ) . We do not see the TMCE button for TablePress. But maybe WC is unhooking stuff ? Maybe you need to hook in later?

[TobiasBg]

Sorry, I don't have WooCommerce installed and can't test with that. My assumption is that they are not using the CPT screens ("post.php" and "post-new.php") directly.
You could probably manually load the buttons by using something like

if ( is_admin() ) {
  add_action( "load-{$editor_page}", array( TablePress::$controller, 'add_editor_buttons' ) );
}

where $editor_page would be the corresponding file name.