Pen tool preview line disappearing during repeated undo

[krVatsal]

When using the Pen tool to draw a path and pressing Ctrl+Z multiple times, the preview line (showing the segment from the last anchor to the cursor) would disappear after a certain number of undos.

Current behaviour:

Recording.2026-02-18.193421.1.mp4

Expected behaviour:

Recording.2026-02-20.122625.1.mp4