SCCM- Upgrade from 2409 to 2509 WSUS timeout issue

Had a working task sequence on 2409 that performed software updates at the end of the task sequence. 

Upgraded to 2509 - I get a timeout issue when getting to that point on the task sequence.

Ive performed maintenance on the WSUS Server, (obsolete, expired etc)

I removed the Software Update Point - and  re installed it selected the Products of Server 2016,2019, server operating system 21h2 , Windows 10 1903 or later and Windows 11. 

rebooted both the SCCM and SQL Server. after doing the above but the HRESULT 0x80244010 still persists. "Exceeded max server round trips" — client couldn't retrieve all updates in one cycle.

Software centre updates in the OS seem to be unaffected or unknown if clients are affected, only in a task sequence this occurs.

Blog posts refer to older items, what would cause this to fail after a upgrade from 2409 to 2509?

AI help repeats about reducing metadata and updates but for weird reason i keep getting 700+ updates for the above categories!