Anamorphic footage is fine in timeline, gets squeezed when exported
Hi everyone!
I recently shot a project on a RED Komodo using anamorphic lenses for the first time. I found documentation that pointed out how to use the Modify > Interpret Footage setting in order to desqueeze the footage for editing in the timeline. Everything about the edit process was fine and looked good.

The problem comes when I try to export my footage. Just to send out a rough cut, for example, I'll go to File > Export > Media, then choose the Preset of "High Quality 2160p 4K", which initially puts black bars at the top and bottom. Then, I click the "Match Source" button under the "Video" section and it looks correct here.

However, once I export, the video file is squeezed into more of a square format (a.k.a. the size of the anamorphic footage before it is desqueezed).

Can someone help me figure out what's wrong here? I'm using:
Adobe Premiere Pro 2023 (ver 23.2.0 build 69)
Windows 10 Home 22H2 (19045.2604)
AMD Ryzen Threadripper 1950X 16-Core Processor 3.40 GHz
Nvidia Geforce GTX 1660
Thank you!
