Possible bug when packing exactly 256 rectangles

[GGG-Agusa]

Description

When passing exactly 256 rectangles to RectanglePacker.Pack, the method completes without throwing an exception, but the resulting positions are incorrect.
ex) RectanglePacker.Pack(rectangles, out _, PackingHints.FindBest, 1, 1, 1026,1026);

• rectangles.Length=256.
• All rectrangles are with W=50 and H=50.

All rectangles are returned with:

X = 0
Y = 0

Expected Behavior

Rectangles should be packed normally with valid X/Y coordinates.

Actual Behavior

No exception is thrown.

The method appears to succeed.

All rectangles have position (0, 0).

Observations

Works correctly with 257 rectangles.

Fails when the count is exactly 256.

Suggests a possible boundary/indexing issue.

Environment

Library version: 1.2.0

Unity version: 6000.3.3f1

Platform: Windows

Please let me know if a minimal reproducible example would be helpful.