iCloud Notes Web-Only Version Not Saving Any Changes or New Notes

To begin, I do not have an iDevice of any kind. I have an Android phone and use Windows PCs or chromebooks. I was shared into an iCloud Note by an iPhone user to collaborate on, and created a Web-Only iCloud account to access and edit the note.

No matter which device or browser I sign into the note from, none of my changes or edits to the Note save. I can edit the Note and see the last edited time change, and I can even create new Notes, but once I leave the page or refresh or look at the Note from a different browser, none of my changes or new Notes are saved at all. My collaborator who owns the note also can't see any of my changes. They only stay locally for as long as icloud.com is open.

As an Android user who has always avoided iDevices, this isn't a good look for the Apple ecosystem, especially when Google's similar services (Keep, Docs, etc.) are virtually seamless with none of these issues.

Help! Any suggestions so that my Note edits can actually be saved?