Mounting via FUSE on Raspberry PI 4 (raspbianOS/debian) show all files as 0 bytes

[ghost]

Thank you for the addition of Fuse , it is working great on my x86/Mint desktop.
However when I mount my vault on Raspberry pi (debian buster on ARM) with the same settings all files in the vault show as 0 bytes.

Steps to reproduce:
I mount my cloud provider with Rclone.
rclone mount CloudProvider: ~/Cloudprovider --vfs-cache-mode writes

I then mount my vault with
java -jar cryptomator-cli --vault CloudVault=~/CloudProvider/CloudVault --fusemount CloudVault=~/CloudVaultMount

The vault unlocks and is browseable, but individual files show as 0 bytes and will not open.

Edit : additional info -

1. Mounting with Webdav works fine, all files show correct sizes and are readable.
2. The maven compile was performed on the PI, copying the JAR over to the Mint 20 x86 machine is working fine.

[ghost]

+1 to this

raspberrypi% stat blah.pdf
  File: blah.pdf
  Size: 0               Blocks: 1612055706 IO Block: 4096   regular empty file
Device: 2ch/44d Inode: 4           Links: 1
Access: (0777/-rwxrwxrwx)  Uid: (    0/    root)   Gid: (    0/    root)
Access: 2021-01-30 17:15:08.360000000 -0800
Modify: 2021-01-30 17:15:08.360000000 -0800
Change: 1969-12-31 16:00:00.000000000 -0800
 Birth: -

Stat is showing zero bytes. Some tools I'm running are doing simple validation by comparing file sizes. Can revert to using dav fs but FUSE is proving to be much faster & reliable.

I compiled the jar on OSX under Java 12; just ran mvn clean install

[infeo]

We will rewrite the project in a different framework, throwing the old code away making this issue obsolete.