Guest app (v 4.7.4) seems not to submit shares privileges correctly

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Hi all,
I've been struggeling a lot with the guest app the last couple of days. Today I have seen and installed the update from v 4.7.2 to v 4.7.4. The guest is created successfully and now the guest receives an invitation email and an email whenever a share is set up. I'm very happy so far.
However maybe the file permissions are not being transferred correctly. So far, I have only encountered this problem with a docx-file. Though in the share editing is allowed, for the guest the file doesn't open and clicking on the file in nc-web-ui, the url of the page (collabora online editor) says <nextcloud-domain>/apps/files/files/204?dir=/&editing=false&openfile=true. Can anyone reproduce the behaviour? Have I overseen something?

Steps to reproduce

As user to share something

1. Create share by inviting a guest
2. Check that share permissions are set to enable editing
3. Confirm share -> share is created successfully

As guest

1. Login
2. Goto shared files
3. Click on shared .docx-document
4. Window shows spinning wheel stating "Loading filename.docx..."

Expected behaviour

I'd expect the file to open for editing and collaborating

Actual behaviour

File doesn't open for editing, wheel spins forever

Server configuration

Nextcloud version: Hub 26 Winter (33.0.3) / AIO instance v13.0.4
Webserver/PHP as per AIO container

Browser

Browser name: Tested in Firefox 151.0.1 (64-Bit) and Edge 148.0.3967.70 (Offizielles Build) (64-Bit)

Operating system: Windows 11

Start by reproducing the guest-app share flow with a shared .docx file, using the listed steps and checking the share's editing permission. Compare the guest's behavior with the expected ability to open and edit the document; done means the file opens instead of showing an endless loading wheel.