I am not sure this is a bug, but wanted to report what is seen in case it is unwanted behavior or can be addressed.
Over time I have tested various GDTF in Vectorworks. This seems to cause what appears to be an empty folder created in C:\Users<User Name>\AppData\Local for each GDTF type.
I have included images of this folder on Windows 10. Unsure if this is happening on MacOS, I honestly don’t know where to look on that operating system to verify that fact.
Unsure if the date modified is the date the folder was created (or last modified) or in some way related to a date saved in the GDTF. See some going back to 2021. This can be tested if information is helpful or important.