The Torque Converter Auto (NOT DSG) T5 thumps into drive when cold

[Rebuild]

This has only recently started the last 1000-1500 km, that i have noticed.Have 160K on it
Gearbox has had partial fluid and filter changes at 75K and 137K with Penrite DX-VI(dexron 6)

04 T5 with Tiptronic auto 6sp
The gearbox thumps into drive or sport, straight from cold.When i select drive there is 2-3 seconds before it selects and thumps.
Doesn't do it into reverse.Selects reverse almost instantly.
Once slightly warm, say 5-10 mins doesn't do it.
No other drive probs.No codes on engine or gearbox through my Autel VAG reader.
Disconnected and reconnected the multipin near selector on top of gearbox, no change.

A quick google seems to point to solenoids or lesser possibly valve body.
At this stage will keep an eye on it, may look into replacing solenoids on next oil change around 200K
Any ideas?