1700+ secs is a hostage situation bro.
the 2026.1 update has some general lag, NetSuite doesn't just hang for 30 mins on an add operation unless it is fighting itself. A delay this severe points to severe database contention or record locking (note that they are panning on stopping SOAP so better migrate to REST).
check your APM, but I'd bet on one of two things:
1. Your SOAP request is stuck waiting for a locked record to release, caused by a heavy batch job (like inventory adjustments or bin transfers) hitting the same items concurrently during business hours.
2. You have a huge stack of UE scripts and workflows firing synchronously on the SOAP execution context, creating customization debt.
Do you actually need your automations to run on this specific integration? If not, pass
<runServerSuiteScriptAndTriggerWorkflows>false</runServerSuiteScriptAndTriggerWorkflows>
in your SOAP header. That will completely bypass the script bloat and force the transaction through.
If you need the scripts to fire, you need to audit your deployment contexts