When creating filenames using accented characters, it disappears from the File Explorer and can’t be found even when using the Open command.
The file is on the filesystem and is saved correct. It simply disappear from Obsidian as soon as it’s saved, and can’t be referenced or opened or anything after the initial save.
To replicate, try creating a file called: coração, either by creating from New, or following an internal link as [[coração]] in another file.