Maximum file size in v11

Dear colleagues,

after an upgrade to ERPNext v11, the maximum upload file size (Web Form) seems to be restricted to 5 MB. The error message when trying to attach a file of > 5 MB is

grafik

As described in other posts (Maximum File Size and this worked well on the same system before the upgrade), the site_config.json contains this:

{
 "db_name": "1bd3e0294da19198",
 ...
 "max_file_size": 150000000
}

Also, the Web Form is configured to allow 100MB:

Note: the upload of the same file works when using the desk (only Web Form affected).

Is there a new, additional parameter that needs to be set?

Using this hotfix, it works: