Typed characters no longer echoed on to a utf8 terminal after read is allowed to time out in a ksh script

Issue

• Within a 'ksh' shell script, if a read from the window is allowed to timeout (<Enter> key not pressed before the 'read' timeout period) the 'tty' 'echo' is off upon exit from the shell script.
• Characters typed in by the user are no longer visible to the user until the 'echo' is turned back on.
• This issue occurs only when the system locale is set to a UTF-8 based character encoding
• The script below demonstrates the problem:

#!/bin/ksh
TMOUT=5
read