Can’t upload files larger than 8 MB on Azure App Service (Linux) with Laravel v11

I’m having trouble uploading files larger than 8 MB on my Laravel v11 application, which is hosted on Azure App Service running on Linux.

Here’s what I’ve already done to configure the upload limits:

1. Set the client_max_body_size directive in Nginx, and verified it’s working as expected:

   client_max_body_size 50M;
   

2. Updated PHP php.ini settings via PHP_INI_SCAN_DIR. Running php -i on the server’s shell (SSH) confirms that the correct parameters are loaded:

   upload_max_filesize = 30M
   post_max_size = 50M
   memory_limit = 256M
   

Despite these settings, I can only upload files smaller than 8 MB. Trying to upload a file around 10 MB results in the following error:

The server returned a "413 Content Too Large".

Interestingly, when I set post_max_size and upload_max_filesize to 1M, I’m still able to upload a 7 MB file successfully.

Here’s the output of php -i | grep max on the server:

    max_execution_time => 0 => 0
    max_file_uploads => 20 => 20
    max_input_nesting_level => 64 => 64
    max_input_time => -1 => -1
    max_input_vars => 1000 => 1000
    max_multipart_body_parts => -1 => -1
    post_max_size => 1M => 1M
    upload_max_filesize => 1M => 1M
    zend.exception_string_param_max_len => 15 => 15
    session.gc_maxlifetime => 1440 => 1440
    unserialize_max_depth => 4096 => 4096

What could be causing this issue? Any help would be greatly appreciated. Thanks in advance!