Pasting a cropped or small image skips image preview and sends immediately

• I have searched open and closed issues for duplicates
• I am submitting a bug report for existing functionality that does not work as intended
• This isn't a feature request or a discussion topic

---

Bug description

Normally, when you paste an image into a chat, a preview window opens, allowing you to see the image before sending it. This window gives you the option to either exit without sending the image or proceed with sending it.

However, there is a bug that I have been able to reproduce multiple times.

If you copy a cropped or smaller than usual image and then paste it into a conversation in the Signal app, the preview window does not always appear. Instead, the image is sent immediately, without giving you the chance to review or cancel it.

Sometimes, the function works correctly, while at other times, it doesn’t. For example, in the video recording below, I was able to reproduce the bug the first time, but not the second time.

The timestamp of the image displayed in the video recording below, as per my Signal Desktop, which synchronizes with the messages, is 1743092235559, sent ⁨27/03/25 at 18:17 Greek time.⁩

I apologize if this is a duplicate issue. I couldn’t find any open issues related to this bug.

Steps to reproduce

There are several ways to reproduce the issue, but this is the simplest one:

• Open a Signal chat.
• Take a screenshot.
• Crop the screenshot to a small size.
• Select “Copy & Delete.”
• Return to your Signal chat.
• Paste the image into the message box.

Actual result: If a cropped or smaller-than-usual image is copied and pasted into a Signal chat, the preview window does not always appear. Instead, the image is sent immediately without allowing the user to review or cancel it.

Expected result: When pasting any image into a Signal chat, a preview window should always appear, allowing the user to review the image before sending it. The user should have the option to either send the image or cancel the action.

Screenshots

https://github.com/user-attachments/assets/b76cd38b-5377-4ec7-a4d0-c9a18b2e072a

Device info

Device: iPhone 15 Pro Max

iOS version: 18.3.2

Signal version: 7.52 (692)

Link to debug log

https://debuglogs.org/ios/7.52.0/dc6af05cec6ba7826850cfdcade3f348312c2f769a8522d16d48c4c4060ad77e.zip

Start by reproducing the issue in a Signal iOS chat with a cropped screenshot copied using “Copy & Delete,” then trace the paste handling from the message box through the preview and send flow. Done means every pasted image opens a reviewable preview, with reliable send and cancel options, rather than sending immediately.