Uploads fail when notification is active

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Steps to reproduce

1. Set up file share (external): Share link > File share, verify that it works
2. Set up flow to notify if file >1B is created
3. Try again to upload a file

Expected behaviour

Tell us what should happen

File is uploaded

Actual behaviour

Tell us what happens instead, if possible also add a screenshot

Upload stops at "only a few seconds left", never finishes

Version: Nextcloud Hub 26 Winter (33.0.8)

Server configuration

It's preinstalled on Hetzner, I don't know about the server details.

Web server: Apache/Nginx

Database: MySQL/Maria/SQLite/PostgreSQL

PHP version: 8.5/8.4/8.3

Nextcloud version: (see Nextcloud admin page)

Start by reproducing the external file-share upload with a notification flow configured for files larger than 1B, as described in the issue. Compare the upload behavior with notifications disabled; done means the file-share upload completes while the notification remains active.