Amp-wp: Dragging not working as expected when CTA block present

[miina]

Bug Description

If there's a CTA block present then adding a Text block and trying to drag it results in the Text block being positioned incorrectly.

This happens only if the block is in the initial position (positionTop=0 due to the CTA block), the blocks that have been positioned before already, don't have this issue.

The reason might be more related to the positionTop value 0 and not specifically with the CTA block.

Expected Behaviour

Dragging should work as expected.

Steps to reproduce

1. Add two Pages
2. Add CTA block
3. Add a Text block
4. Try dragging the Text block
5. See the dragging not working as expected.

Screenshots

Additional context

• WordPress version:
• Plugin version: develop
• Gutenberg plugin version (if applicable):
• AMP plugin template mode:
• PHP version:
• OS:
• Browser: [e.g. chrome, safari]
• Device: [e.g. iPhone6]

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Acceptance criteria

Implementation brief

QA testing instructions

Demo

Changelog entry

[swissspidy]

I can confirm seeing the same, but only once. When dropping the text block and dragging it again, it works as expected. Very odd.

[miina]

I can also see it only once. It might have something to do with positionTop being 0.

[barklund]

If you cut it and paste it in the same place on the same page (or another page), there's no issue. So it's probably not the position. It's somehow not initialised correctly.

But I guess this needs priority and AC before we investigate further.

[spacedmonkey]

I am not seeing the same Ubuntu in Chrome and Firefox.

[jauyong]

I can't replicate this

[miina]

Looks like something fixed it meanwhile, perhaps #3584.

Also can't replicate this anymore.

[swissspidy]

Closing this for now in that case :-)