In Delphi 13.0, code highlighting causes trailing shadows when scrolling

[myonlylonely]

Is this has something to do with the double buffer that Delphi 13.0 newly introduced in the IDE?

[cnpack]

We also noticed this problem but no clue to resolve yet.

[cnpack]

We make some optimization in our latest nightly-build 1277, please try to check it？

https://www.cnpack.org/downbuilds.php

[myonlylonely]

It seems it is better.
But when the current selected line is very long, and scroll this line to the upper side, the line still shows some trailing shadows.
I have recorded a video to show this.

2025-09-17.100744.mp4