Help needed with Export As function

Edit: I didn’t see the reply from ​@Kevin Stohlmeyer 

As an aside, it's never a good idea to have multiple periods in the filename as this is used to distinguish the file extension and some software isn't smart enough to only look at the characters after the last period. 

​@anhducworking2609 seems to be a macOS issue, as I could not replicate it on Windows with Photoshop 27.8

I'm using Adobe Photoshop 27.8.0 Release on macOS, and I found what appears to be an inconsistency in the Export As filename handling.

Steps to reproduce

1. Create a new Photoshop document.
2. Save the document as 1. Topbanner.psd.
3. Go to File → Export → Export As...
4. Export as PNG or JPEG.

Expected result

The exported filename should be:

1. Topbanner.png

Actual result

The exported filename becomes:

1.png

Everything after the first period (.) is removed.

Additional observation

If I create an Artboard with the exact same name:

1. Topbanner

and export it using Export As, Photoshop correctly exports:

1. Topbanner.png

This suggests that Document Export As and Artboard Export As use different filename parsing logic.

Environment

• Photoshop 27.8.0 Release
• macOS
• Reproducible every time
• Happens with both PNG and JPEG exports

Workflow impact

Many designers organize PSD files using numbered filenames such as:

• 1. Hero Banner.psd
• 2. Facebook Post.psd
• 3. Story.psd

With the current behavior, the exported files become:

• 1.png
• 2.png
• 3.png

instead of preserving the descriptive filenames.

Could you please confirm whether this is an intended behavior or a regression? If it is a bug, I would appreciate it if it could be forwarded to the Photoshop engineering team for review.

@shiralee.munro normally periods in file names are a recipe for disaster. Operating Systems (Mac or Windows) read that as a terminator normally found at the end of a file name with the file extension proceeding it. It's a good way to corrupt files.