Sorry, for my bad english. mkv video resolution is 1920 x 800 mkv internal subtitle resolution is 1920 x 1080 so, when aspect ratio is set to fit. the picture size is correct. with top and bottom black bar. but the subtitle shape is incorrect. it smaller and the position is higher than it should be but, when aspect ratio is set to full. subtitle shape is correct. but the picture size is incorrect. the picture size is set full screen without top and bottom black bar. (picture shape is taller) it look like subtitle is render at base video resolution. which is 1920 x 800 not 1920 x 1080 is there anyway to fix it. thank you ^_^
i also have the same problem as you. and i think the dev has no intention to fix this. i have post the problem months ago. but there is no fix!! Egreat has no problem with this. but egreat has 4K HDR problems unlike zidoo . HDR work fine.
thank you for sharing. i think it might be Realtek Chip, because Zappiti has this problem too. but, i've already sold ZidooX8 in 2nd hand for a while. and now, i'm with DuneHD Solo 4K and has no problem with this.