Image preview in multpart/form-data breaks the app

Description

When you upload a multipart request where one part is an image, ProxyMan tries to preview it (great feature btw!).
However, if the image part is not a valid image (or even if valid but maybe not supported by the preview tool you use), the app becomes unresponsive. Only "Force Quit Application" helps

Steps to Reproduce

1. Make a regular multipart/form-data request
2. Add a byte array part with content-type for some image (e.g. image/jpeg)
3. Try to open "multipart" tab of the request
4. (issue happens, app is unresponsive)

Current Behavior

Explained above, screenshot here:

Expected Behavior

Preview can be omitted, or an error text shown — but not the app frozen.
For me, it is enough to "export" the "part" as a file, no need for preview at all

Environment

Actually, happens for a few versions already + different macOS versions (on Sonoma too). Managed to file an issue only now :)

• App version:Version 4.13.0 (49400)
• macOS version: macOS Ventura 13.6 (22G120)