"Document loading failed" when clicking on the most-recently-saved version in "Versions" when already open

Describe the bug
A clear and concise description of what the bug is.

To Reproduce
Steps to reproduce the behavior:

1. Load an existing document in Collabora Online
2. Make a change and save
3. Use "share" and go to "Versions"
4. The most recently saved version will be listed as e.g. "You 4 seconds ago"
5. Click that version
6. Document loading failed

Expected behavior
The most recent version, which is presumably not "versioned" but is just the normal document, should be presented

Screenshots

Nextcloud log (richdocuments), 09:01:36 UTC:

getFile failed: /246facfc-.../files_versions/whatever.ods.v1784796246
Exception: OCP\Files\NotFoundException
userAgent: COOLWSD HTTP Agent 26.04.2.2snapshot

Stack: WopiController::getFile -> IVersionManager::getVersionFile ->
LegacyVersionsBackend::getVersionFile -> Folder::get (throws
NotFoundException).

Collabora coolwsd log, same moment (16 identical retries, 09:01:36 to
09:02:00 UTC):

WOPI::GetFile [https://.../richdocuments/wopi/files/2829613_ocytfm4ehh09_whatever/contents?access_token=&access_token_ttl=0&permission=readonly] failed with Status Code: 403 (Forbidden)

Server details

Nextcloud version:
Nextcloud 33.0.6.2

Version of the richdocuments app
richdocuments 12.0.0

Version of Collabora Online
Collabora Online / COOLWSD 26.04.2.2snapshot

Start by tracing the reported stack from WopiController::getFile through IVersionManager::getVersionFile, LegacyVersionsBackend::getVersionFile, and Folder::get. Reproduce the Versions workflow with a recently saved document and use the Nextcloud and Collabora logs to compare the requested version path and WOPI response. Done means clicking the newest saved version opens the document instead of producing a loading failure.