PATCH REST API to update a SharePoint List Item will put a blank value to a "Multiple lines of text" field with append changes option activated

[Aymkdn]

Target SharePoint environment

SharePoint Online

What SharePoint development model, framework, SDK or API is this about?

SharePoint REST API

Developer environment

None

What browser(s) / client(s) have you tested

• 💥 Internet Explorer
• 💥 Microsoft Edge
• 💥 Google Chrome
• 💥 FireFox
• 💥 Safari
• mobile (iOS/iPadOS)
• mobile (Android)
• not applicable
• other (enter in the "Additional environment details" area below)

Additional environment details

Not applicable because the problem is related to how SharePoint treats the REST request. It's a server side issue.

Describe the bug / error

The issue I opened 1 year ago has been automatically closed. So I'm reopening it: #9462

I provided there all the details related to this bug. I spent quite some time to describe the bug.

Steps to reproduce

See original issue at #9462

Expected behavior

See original issue at #9462

[Ashlesha-MSFT]

Hello @Aymkdn,
Thank you for bringing this issue to our attention. We will look into it and get back to you shortly.

[Ashlesha-MSFT]

@Aymkdn,
We were able to reproduce the issue, and we are investigating it. We have logged this as a bug, and our engineering team will look into it.
Thank you for your patience!