Stuttering movies with subtitles with LE8

Every movie stuttering a little when subtitle displayed.
It happens with all 8.x release of libreelec.

with libreelec 7.0.3.012j isn't stutter.

It's fixable?
What cause this problem?

Quote from Klojum

After 278 posts on this forum, you should know by now that such a small problem description does at least need a full kodi.log, as well as some info on your setup, such as AV receivers and other possible hardware.

Also inevitable, did you check up video and audio sync options?

I dont think it helps, but the needed infos:
TV: LG 55EG910V (oled)
AVR: Onkyo TX-NR555
Player : S905 MiniMX nand libreelec 7.0.3.12j, and sd card 8.0.1c
AVR show 23fps

With LE8 playback is fine, but just when subtitle displayed
But i now restart my player, and its repaired.
I will serve log, when i see stutter again.

One movie stutter again after an hour.
here is the log:
gbeF

I have other observation too:
The gui refresh rate setted to 60Hz, but my avr informed me, it is only 59.97
And when I played back 60 fps videos then played back as 59.97 too.
I reboot to 7.0.12j and there gui is 60Hz and 60fps video play at correct 60hz
with the latest 8.0.1d
Before (I don't know exactly when checked last time) it was 60Hz, and playback was 60fps

log:
VHXK

maybe the 1/1.001 fps hack isn't switch off?
with fps 23.97,29.97,and 59.97 needed, but 24,50,60 not

I play test files with LE 7.0.12j on nand and 8.0.1d on sd with this results:
LE8.0.1d:
gui set to 60Hz, but avr show 59 (bad)
23.97 fps movie play az 23.97Hz (good)
24 fps movie played at 23.97 too!!! (bad)
25 fps movie at 50Hz (good)
30 fps movie at 59.97hz (bad)
29.97fps movie at 59.97 (good)
60 fps movie at 59.97 (bad)
50 fps at 50Hz (good)

LE 7.0.12j:
gui set to 60Hz avr show 60Hz (good)
23.97 fps movie played at 23.97hz (good)
24 fps movie played at 24hz (good)
25 fps movie at 50hz (good)
29.97 fps movie at 60hz (not good)
30 fps movie at 60hz (good)
50 fps movie at 50hz (good)
59.97 fps movie at 60hz (not good)
60 fps movie at 60hz (good)

same files with LE8.0.1 and Raspberry pi2b :
60hz gui at 60 (good)
23.97 at 23.97 (good)
24 at 24 (good)
25 at 50 (good)
29.97 at 59.97 (good)
30 at 60 (good)
50 at 50 (good)
59.97 at 59.97 (good)
60 at 60 (good)