Drop line not rendered after auto-expansion

[rkeen-siemens]

Apache NetBeans version

Apache NetBeans 22

What happened

Drop line is not rendered after auto-expansion, but it should

https://github.com/user-attachments/assets/d2aa1737-91e7-4f8e-b779-7289e63fc9a7

Language / Project Type / NetBeans Component

No response

How to reproduce

1. Drag an object a tree view (e.g. the Projects explorer) it; you’ll see a horizontal line when hovering between two objects to indicate the target position
2. Keep dragging and hover over an expandable object (e.g. a folder) which will then auto-expand

After the auto-expansion, hovering between objects no longer renders the horizontal line. I would expect the drop line to continue to be rendered even after the auto-expansion.

Did this work correctly in an earlier version?

No / Don't know

Operating System

Windows, Mac, Linux

JDK

21.0.3 (and others)

Apache NetBeans packaging

Apache NetBeans provided installer

Anything else

No response

Are you willing to submit a pull request?

No

[mbien]

interesting, also reproducible with Metal LaF, so it seems to be LaF independent.

[neilcsmith-net]

Does this affect your platform application too? A contribution to fix this would be welcomed.