Cannot copy/paste filename in Save dialog

Since my Tahoe upgrade 2+ months ago whenever I download a file (from Safari, Mozilla, Chrome) I can't copy or paste in the filename edit field.

Whenever I attempt to copy part of a filename in the Save dialog edit field I hear a 'blorp' sound and nothing happens. It's the same thing when I try to paste text into the Save dialog filename field.

The only workaround so far...

1) Manually select the existing filename and create a new name

2) For the next file, set the Save dialog file list to "Date Modified"

3) Click on the recent filename

4) The click on the end of the filename and add a number or or additional description terms

That's a lot of mousing and clicking!

I'm hoping there's an easy setting I've missed somewhere, but I've searched extensively this issue seems to be missing from Apple Support and even Google.

MacBook Pro 16”

model name: MacBook Pro (MBP 16.0 SILVER CTO)

model identifier: MacBookPro16,1

2.3 GHz 8-Core Intel Core i9 32 GB

MacOS: Tahoe 26.1 (up to date)