I did escalate it - after 3 days MS support sent me email informing me, they opened the case. 3 days later I got email the case is closed, but nobody contacted me and nothing has changed. They sent me satisfaction survey instead. Will you call it support?
I was playing with other shared folders' owners the same game as you Johny. Part of the links turned back to direct access from OneDrive. Part is not working and finally I lost access to one of them since I am not able to create link in my home folder, thus the folder is not accessible outside of the browser. No error message to know the reason. Seach in browser finds it and the only way to access it is via browser. No phone access, no OneDrive app on desktop access.
But guess what, when the issues started, I lost access to OneDrive Vault on my Android phone - it was empty! They asked me to register password to the Vault again (why?) and nothing happened. Vault was empty. Two days later the Vault items are back!? On iPhone I can't see any Vault! Still.
Really, great job! Dees the right hand in MS knows what the left hand is doing? Instead of solving issues MS came with the new design on the OneDrive login page in browser.