Collaborative playlists rights totally inconsistent

[ProkopHapala]

I have roughly 30 playlists shared with my friend. But we have constantly problems that she see it differently than me (e.g. I share something, invite her as collaborator, I see it as collaborative, I see her icon there as collaborator, but she does not see it as collaborative and cannot add songs). wth???

Now we realize that it is not only inconsistent among our two accounts, but it is even inconsistent within one account (e.g. I see different status/rights on android app, on desktop app and on web interface). It seems that it even change over time by itself without me doing any action. 

This problem We have as long as we use spotify (~3 years), and it is rather getting worse than better. What a piece**bleep** is this? How the company with billion+ people userbase and market capitalization 30 billion $ cannot take care of such simple thing?