Document renders blank when re-opened with the same ID after closeDocument

[ivaylostefanov97]

When a document is closed via closeDocument() and then re-opened with openDocumentUrl() using the same documentId, the document appears blank — scrollable space is present (as if pages exist) but nothing is rendered.

Steps to reproduce:

1. Open a document with a given ID (e.g. "doc-1")
2. Close it with docManager.closeDocument("doc-1")
3. Wait for DocumentClosed event
4. Re-open with docManager.openDocumentUrl({ url: "...", documentId: "doc-1" })

Expected: Document opens and renders normally, same as the first time.

Actual: OpenDocumentBuffer succeeds, DocumentOpened fires, but pages render blank. The scroll area reflects the correct page count/dimensions but no page content is painted.

Environment:
@embedpdf/*: 2.4.1
Browser: Chrome (latest)

Notes:

Waiting an arbitrary amount of time (15+ seconds) between close and re-open does not help — this is not a timing/race condition.
The first open with the same ID always works. Only subsequent opens after a close are affected.
Using a different documentId for the re-open works around the issue.