Just so you know, I have come across some screenshots last night claiming this Achilles heel of ZCash is allowed to exist on purpose. I am not saying I subscribe to this belief but I have seen screenshots indicating “ZCash will purposefully be made to look like it is private but some things will be put in place to make it really hard for it to be completely private”. I wish I had saved it but it is gone now, I’ll post it here next time it shows up.