The autzen-classified dataset contains a Coordinate System WKT VLR of length 993B. According to the specification:
The OGC Coordinate System WKT VLR data shall be a null-terminated string.
However the dataset's VLR string is not null-terminated, see my messily annotated screenshot.

The first byte of data is at 0x2e7, the last byte is 0x6c7(993B later), and there's no null terminator afterward. Any chance you can fix the dataset?
The non-classified dataset has the same issue. I haven't checked any others.