On GitHub, this problem has also been reported. See here: Cannot see all files in Vault after upgrade to 1.7.3 · Issue #2807 · cryptomator/cryptomator · GitHub
Currently you can use the older Fuse-T version. This can be found at: https://github.com/macos-fuse-t/fuse-t/releases/download/1.0.14/fuse-t-macos-installer-1.0.14.pkg