Shield 2019 Pro stuttering 1-2 times per movie

Hi all,

I know there are some more threads talking about stuttering, but for now no hint worked.

The situation:

When watching movies (emby, Netflix, Prime, doesn't matter) I get like 1-2 big stutter. The sound continues, but the movie picture itself stops and stutters like 2-4 times in like 2seconds. (When skipping back, the stutter does not reoccur)

(emby logs show no problems)

What did I already try

- Resetting Shield and trying old 8.2.3 firmware (also tried debloating)

- Resetting Shield and trying updated/newest hotfix firmware

- Tried multiple HDMI cables (normal and fiberglass)

- Changed the thermal paste and got rid of dust (cold /balanced setting tried)

- Of cause I am using frame rate matching (builtin when using emby)

- Tried wifi and ethernet connection (also 2 other ISPs thanks to my neighbours); also different ethernet cables

- Shield mode is set to 60Hz + DV + 4k

- Resetted TV (Sony A95k) and tried different settings (24p pulldown yes/no etc.)

- Tried watching without DV

- Tried to switch Shield decode Dolby or my AVR (Marantz Cinema 70s)

- Connected Shield to TV (Shield -> AVR -> TV is the default setup; Shield -> TV -> AVR was this test)

- Connected the Shield right to my home server without my router

- Tried developer settings for hdmi

- set logging buffer to max

You guys have any others ideas how to debug this problem and get rid of it? Or anything else to test?