Copy files on a vault makes copy/paste fails

Hello,
I’ve just updated to the 1.5.1 version. I wanted to see if the problem was still there with this version (I did’nt change the settings, it’s still FUSE).
Result : I have the same problem, with the copy which failed and never finish.
Then I wanted to close the vault to test with WebDAV, but here, I cannot close it ! I click on the “Verouiller” button (in french), and nothing happens.
I went to the Cryptomator/logs/cryptomator0.log (the last modified), and I saw this :

Caused by: org.cryptomator.frontend.fuse.mount.CommandFailedException: Command failed with exit code 1. Expected 0. Stderr: fusermount: failed to unmount /home/mentalo/.local/share/Cryptomator/mnt/2KyJMvS5QmRi_0: Device or resource busy
  at org.cryptomator.frontend.fuse.mount.ProcessUtil.assertExitValue(ProcessUtil.java:26)
  at org.cryptomator.frontend.fuse.mount.AbstractMount.unmount(AbstractMount.java:51)
  at org.cryptomator.common.vaults.FuseVolume.unmount(FuseVolume.java:144)
  ... 8 common frames omitted
18:35:16.944 [JavaFX Application Thread] DEBUG o.c.common.vaults.VaultStats - start recording stats
18:35:17.669 [JavaFX Application Thread] DEBUG o.c.common.vaults.VaultStats - stop recording stats
18:35:17.673 [JavaFX Application Thread] ERROR o.cryptomator.ui.common.VaultService - Failed to lock vault_name
org.cryptomator.common.vaults.Volume$VolumeException: org.cryptomator.frontend.fuse.mount.CommandFailedException: Command failed with exit code 1. Expected 0. Stderr: fusermount: failed to unmount /home/mentalo/.local/share/Cryptomator/mnt/2KyJMvS5QmRi_0: Device or resource busy
  at org.cryptomator.common.vaults.FuseVolume.unmount(FuseVolume.java:147)
  at org.cryptomator.common.vaults.Vault.lock(Vault.java:125)
  at org.cryptomator.ui.common.VaultService$LockVaultTask.call(VaultService.java:341)
  at org.cryptomator.ui.common.VaultService$LockVaultTask.call(VaultService.java:325)
  at javafx.concurrent.Task$TaskCallable.call(Task.java:1425)
  at java.base/java.util.concurrent.FutureTask.run(Unknown Source)
  at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
  at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
  at java.base/java.lang.Thread.run(Unknown Source)

First, I don’t know what to do. I can let the vault opened, but I shut down the computer every night, because I sleep near. So, will my vault be broken if I cannot close it properly ? Tomorrow, could I open it without problem ? :stress: