Save for web excluding file extension in output file
I'm using Photoshop 2020, newest update.
When saving for web (after choosing format, compression, etc.), the file name is selected, ready for me to either hit enter or type in a new name (all good so far). I type in the new name, and hit enter. The resulting file name is all good, but the extension is gone. Surely this is unexpected behaviour, an oversight? It can't be meant to be this way, that all files saved via "save for web" lack file extensions if you type in a new name? I'm annoyed.
As the screenshots below show, I have file extensions enabled in Finder.
