buffer renamed "expand(" on save

This issue has plagued me for years in MacVim and I have not been able to identify the source. It is intermittent, and occurs roughly 1 every 100 hundred saves (so probably 2 or 3 times per day). I cannot say what triggers it but I have not been able to make it go away. Any advice or fix gratefully received.

What happens:

• I hit <D-s> to save current buffer, which is already associated with a filename
• the buffer is not saved
• current buffer is magically renamed expand(, the contents are unaffected
• editing continues as normal (If I try to save again, then a new file called expand( is saved to disk).

Environment

• Vim version 8.2
• MacOS 11.6
• Terminal: GUI

Comienza reproduciendo el comportamiento intermitente al guardar en MacVim con Vim 8.2 en macOS 11.6 usando en un búfer con nombre. Investiga la ruta de guardado y el manejo de la GUI en torno al renombrado del búfer a expand(. Se considera terminado cuando el búfer original sigue asociado a su nombre de archivo y se guarda correctamente cuando se desencadena el problema.