yes, that is expected behavior and a very common confusion the forum.
https://rclone.org/commands/rclone_mount/#vfs-directory-cache
"changes made directly on the cloud storage by the web interface or a different copy of rclone will only be picked up once the directory cache expires"
check out my summary of the two rclone caches.
https://forum.rclone.org/t/status-about-using-rclone-for-music-storage-playback-in-2021-access-times-improved/27648/34