write/read problems with IVF compiler v. 17

Updating from ivf compiler version 16 to version 17 (17.0.1.143) has caused some strange behavior when writing/reading from files.

A file is opened written to and read with the following:

      open(unit=17,file=path/name.ext,&     access='sequential',form='unformatted',status='unknown',&     action='readwrite')
      write(17) some_large_record (around 36000 4-byte words)
...
      rewind 17
      read(17) some_large_variable 

No problems occur using the compiler version 16. But with version 17 I get the following error when reading from the file:

"forrtl: severe (67): input statement requires too much data, unit 17"

Adding the recl=40000 to the open statement removes the problem, but since this approach is used a lot throughout the code, I would like to know the source of the problem.

Setting recl=30000 gives me a meaningful error when writing to the file ("output statement overflows record") which does not occur when leaving out recl.