> For the complete documentation index, see [llms.txt](https://docs.apryse.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.apryse.com/web/changelogs/version-12/v12-0-1.md). # Version 12.0.1 Changelog (2026-07-20) ## WebViewer Core The WebViewer Core changelog covers low-level API, engine, and infrastructure changes that power the Web SDK. ### Fixes #### DOCX Editor * Fixed rendering issue in specific scenarios after replacing selected text. #### Spreadsheet Editor * Fixed an issue where undoing or redoing a cell value that was referenced in a formula would not update dependent charts correctly. ## WebViewer UI The WebViewer UI changelog covers user interface, customization, and workflow enhancements available through the Web SDK. ### Fixes #### Multi-instance * Fixed several issues where multiple WebComponent instances on the same page could interfere with each other, including cross-instance React reconciliation crashes on dispose/re-render, `UI.dispose()` corrupting other instances or clearing more of the UI than intended, `UI.setTheme()` toggling the wrong instance's theme, and the `Open file` picker loading a document into the wrong instance. * Fixed a crash that occurred when clicking an annotation in the Notes panel of one WebViewer instance while another instance was also mounted on the same page. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://docs.apryse.com/web/changelogs/version-12/v12-0-1.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.