Query block: Conflict with excerpt_more filter

[dashkevych]

Description

It looks like the Query block outputs multiple More links when the Post Excerpt block is used within the Query block , and excerpt_more filter is used in the theme functions.

Step-by-step reproduction instructions

1. Create new page.
2. Add the Query block to the content area (Grid View, and 3 columns layout to display 3 latest posts).
3. Select the Post Excerpt block.
4. In the Post Excerpt settings, set "Max words" to 25 and check option "Show link on new line".
5. Add "read more" link text.
6. Publish page.

Expected behaviour

Only one More link should be shown in the excerpt section.

Actual behaviour

The excerpt section displays two More links: one from the theme, added via excerpt_more filter, and another from the Query block, with a custom text added using the Editor.

WordPress information

• WordPress version: "5.8-alpha-51064"
• Gutenberg version: Not installed
• Twenty Twenty-One: "1.3"
• Are all plugins deactivated? "Yes"

[dashkevych]

Additionally, I've noticed that if the Read More link is wrapped within p tag and added using the excerpt_more filter, the block creates additional empty p tag:

[dashkevych]

It seems like this issue has not been fixed. It still shows two links in the Editor:

I've tested it in WordPress 5.8 with Twenty Twenty-One (Version: 1.4)

[ntsekouras]

It seems like this issue has not been fixed. It still shows two links in the Editor:

Currently PostExcerpt block does show the rendered output in the editor, but if the theme uses excerpt_more filter, it's removed in the front-end. You can read the PR's description with these changes, where I explain some challenges to make this block consistent.

It will need more thinking and explorations in the future to make this as consistent as possible, but all the applied filters which some are conditional, makes it a tough problem.