The delay adjust is on subtitle selection>subtitle quick menu
From my experience negative delays do not have any effect, only positive values work with teletext subtitles.
Well, thank you for this, but I havn't found in my OpenPLI4.x version anything about subtitle delaying..
Still, this is besides the point that there might be some error that could fixed?
I can deliever some .ts sample recordings if some DEV personel would like to take a look into this...