Did clean installation of ddev on my Mac.
Set up Drupal 8 project and have problems with file permissions on sites/default/files folder. For some reason it resets the permissions I set (chmod -R a+w) and web server can't write to this folder afterwards.
Files are owned by uid_1000 gid_50.
Example of the message
Warning: file_put_contents(sites/default/files/php/twig/5c1ad9b345ce5_status-messages.html.twig_3IhisVoQLOYIb64NBegMDuHJs/.htaccess): failed to open stream: Permission denied in Drupal\Component\PhpStorage\FileStorage->ensureDirectory() (line 123 of core/lib/Drupal/Component/PhpStorage/FileStorage.php).