I have the same behavior on the frontlight after resuming from standby.
No on ghosting. Under what circumstances do you see it?
I always use full refresh never in the default ebook reader (with lowest contrast setting), and a custom Times regular font, and never see any ghosting.
If you are talking in an android app, there are a buch of longpress/customize settings to adress that. Regal mode claims to refresh 'differently'. Animation delay delays screen refresh after touch, so any potential animations are filtered out, and regular refresh intervall (which I have disabled), lets you set the period until an additional full refresh.
The default Boyue reading app has those full refresh settings in its setting. For any other android app, > longpress:customize.
Thats one of the things I don't like with Boyue devices. The quality of people that look at ereaders these days - is so poor, that they cant identify significant changes, or handle a little bit more complex options.
If I hear the youtube influencer from goodreaders state another time, that you "wouldnt buy Boyue devices for the ebook reading app" - and that "it only comes with one font" - I facepalm so hard, my hand hurts. (Nowadays Boyue even puts up a info message, when you try to change the font for the first time, that tells you that you can supply custom fonts. As many as you'd like.)
So I havent noticed a significant difference, neither on books, nor on comics, and if there were one, there are a bunch of settings you can play with to customize that behavior so hard - there hopefully is a solution for your woes.
edit: Also make sure A2 mode is disabled.
(ghosting on that is expected.
)
edit2: Me not noticing it, doesnt mean, that there wasnt a change.
But I really don't notice any ghosting on several usage patterns, so my first question is - where do you see it, to try to confirm it existing myself.