[kepano]

Make sure to set your Obsidian folder to "Keep downloaded" on iCloud for every device. Otherwise iCloud automatically deletes files locally to save space on your device.

It's a terrible default and Apple doesn't provide any way for developers to detect if it's off.

[hadik]

Thanks for the advice. I have "Keep downloaded" enabled already for all my devices, so it does not seem to be the cause for this issue, although I am sure it may be a factor for others.