Angel of Attack wrote on Jun 15^th, 2021 at 10:37am:

Still with 1.0 But now I actually find out what could cause it I guess it's the AUTO SLATS unrealistic working on ground. I noticed every time I heard it, my speed it just around the surface wind speed. and my slats will stay FULL EXT even with Flaps5, if I got lower than 0 kts IAS on ground. Also same sound could be hear when in air with bumpy ride and AUTO SLATS actually working. So I think there are 3 bugs with this phenomena: 1. AUTO SLATS should not work when aircraft on ground, regarding the AOA. 2. When AUTO SLATS actually working, there should be no noticeable sound in cockpit. 3. as per FCOM 9.10, control and indication on Leading Edge Transit Light, there is a Note: Light is inhibited during autoslat operation in flight.

Also I noticed in 734 1000 (but as well as 733 and 735), the Auto slats are triggered way before it should in air.
on 734 with 51 tonnes, flying with F5 at 170kt (the maneuver speed, recommended to fly at), the AUTO SLATS already Fully extended.
As this video: https://www.youtube.com/watch?v=a4V8W31YwTQ
Auto slats only fully extended very near to stall.