I would say sounds like something more for the support forum instead of the prelease bug section? If you're having issues from/after swapping/breaking cache (pool?) drives, and now missing folder structures, you may have larger/other issues (maybe location of appdata, domains, etc....).
Not trying to police by any means, you just might get the proper help there.
EDIT: There is a normal cadence you should follow when swapping cache, and it goes along the lines of disabling dockers and vm's, changing your shares cache only option, then invoking the mover to move everything from cache to clear the drive, then disable auto array start, shutdown and swap cache drive, boot up, assign new cache drive, then adjust shares again to prefer cache, invoke the mover to move files to cache, then set as cache only.
https://wiki.unraid.net/Replace_A_Cache_Drive