Preview Designer Rendering Workflow Incorrectly and Causing Execution Errors in Logic App Standard.

[vivek967]

Severity

P3 - Medium (Minor functionality affected)

Describe the Bug with repro steps

I would like to report a potential bug observed in Logic App Standard related to the new preview designer.
Issue Summary:

A customer is experiencing functional and visual issues in Logic App Standard after switching from the old designer to the new preview designer.
The workflow functions correctly in the old designer but can’t execute the workflow properly in new preview designer, and the new designer displays the workflow architecture in a disorganized manner, making it difficult to follow actions and understand the flow.

Expected Behavior:

• The workflow should execute successfully in the new preview designer, just as it does in the old designer.
• The workflow architecture should be clearly structured, readable, and accurately reflect the sequence of triggers and actions.
• The visual designer should properly display all actions, branches, and triggers without misalignment or missing connections.

Actual Behavior:
• The workflow designer does not open properly from the new preview designer.
• The Flow layout appears disorganized and difficult to follow.
• Multiple triggers and actions appear incorrectly aligned, leading to confusion and incorrect execution paths.
• The same workflow functions correctly when opened and executed in the old designer.

Here is a customer environment screenshot:

<img width="1966" height="928" alt="Image" src="https://github.com/user-attachments/assets/b5e9f9f2-6e81-4d23-9683-b6422abb1234" />

Request:
Please investigate this behavior in the new designer experience. The customer prefers to use the new experience, and we would appreciate guidance on next steps or any available workarounds.

I have provided the workflow.json file to PG.

What type of Logic App Is this happening in?

Standard (Portal)

Are you experiencing a regression?

No response

Which operating system are you using?

Windows

Did you refer to the TSG before filing this issue? https://aka.ms/lauxtsg

Yes

Workflow JSON

In our internal discussion. I have provided the workflow definition to PG.

Screenshots or Videos

Environment

Logic app Resource URI : subscriptions/53b617b1-2b8a-4f6b-8cdd-2788b0348ca6/resourceGroups/NZE2-VaaS-RGP-P-Prime/providers/Microsoft.Web/sites/nze2-vaas-lap-p-std-ng1-alert-rcvr

New Preview designer Version detail info:

Health status : Healthy

Logic App: nze2-vaas-lap-p-std-ng1-alert-rcvrTrigger URL

Session ID: 0c38d7e5d66046d8b6ece3975c9b949f
Azure EMA version: 2.51208.1.1
Designer version: 5.248.0
Runtime version: 1.156.11
Function traces: nze2-vaas-lap-p-std-ng1-alert-rcvr

Additional context

Please contact me via Teams or email if you need any additional information.

[rllyy97]

Hi @vivek967 - I think the issue you're seeing has to do with some kind of bug in preview designer at the time when generating the draft flow artifacts.
We recently did a refactor of the draft state management that may have resolved any issues that were previously present in the preview designer.
If you want to try your repro out again to see if your issue is resolved, the environment can be found here:
https://aka.ms/emacanary
(This is a pre-production environment so it is advised to use this only on non-production workflows)

In this new version, if you still have your old (incorrect) draft artifacts present, we have a Discard draft button in the command bar overflow that should reset your draft state to match production / fix any pre-existing issues with your draft.