Drag and drop sort on custom block view causes flickering and jumping blocks

[CimplexAB]

Which Umbraco version are you using?

17.1.0

Bug summary

Changing the sort order with a list of custom block views results in jumping blocks and flickering.

chrome_96I1yGHFyp.mp4

Specifics

No response

Steps to reproduce

Create a block list with a custom view, use this code for example:
https://docs.umbraco.com/umbraco-cms/tutorials/creating-custom-views-for-blocklist

Create a couple of blocks, save, then try to sort them.

Expected result / actual result

No flickering and no jumping

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This item has been added to our backlog AB#64824

[github-actions]

Hi there @CimplexAB!

Firstly, a big thank you for raising this issue. Every piece of feedback we receive helps us to make Umbraco better.

We really appreciate your patience while we wait for our team to have a look at this but we wanted to let you know that we see this and share with you the plan for what comes next.

• We'll assess whether this issue relates to something that has already been fixed in a later version of the release that it has been raised for.
• If it's a bug, is it related to a release that we are actively supporting or is it related to a release that's in the end-of-life or security-only phase?
• We'll replicate the issue to ensure that the problem is as described.
• We'll decide whether the behavior is an issue or if the behavior is intended.

We wish we could work with everyone directly and assess your issue immediately but we're in the fortunate position of having lots of contributions to work with and only a few humans who are able to do it. We are making progress though and in the meantime, we will keep you in the loop and let you know when we have any questions.

Thanks, from your friendly Umbraco GitHub bot 🤖 🙂