TWS 8.4 on HP-UX - lookups?

Just wondering if anyone else is using IBM's TWS on HP-UX 11.11i. Seeing some very strange name-lookup issues when it comes to using various utilities on the system. The same software works fine o0n AIX, Linux, Solaris, etc, but on HP-UX there is noticeable time lags in issuing commands - at the shell level. For example, trying to execute conman type commands, can hang for a minute or more before coming back. if you sniff the net while this is "waiting" you see lots of DNS requests that don't seem to make sense.

This is TWS 8.4 and just wondering if there are others out there using this slightly older release (because of support issues) on HP.

thanks