Can't lock folders encrypted with fscrypt

I have multiple folders encrypted with fscrypt in various directories. They have various files in them (images, videos, text). I open a file and close it with Ctrl+Q. Then I want to lock the folder with `fscrypt lock test/`, however it always fails. Doesn't matter which folder or which file.

```
[ERROR] fscrypt lock: Directory was incompletely locked because some files are still open. These files remain
accessible.

Try killing any processes using files in the directory, for example using:

find "test/" -print0 | xargs -0 fuser -k

Then re-run:

fscrypt lock "test/"

```

Running `find "test/" -print0 | xargs -0 fuser -k` as user I get:
```
Cannot stat file /proc/1025/fd/0: Permission denied
Cannot stat file /proc/1025/fd/1: Permission denied
Cannot stat file /proc/1025/fd/2: Permission denied
Cannot stat file /proc/1025/fd/3: Permission denied
Cannot stat file /proc/1025/fd/4: Permission denied
Cannot stat file /proc/1025/fd/5: Permission denied
Cannot stat file /proc/1025/fd/6: Permission denied
Cannot stat file /proc/1025/fd/7: Permission denied
Cannot stat file /proc/1025/fd/8: Permission denied
Cannot stat file /proc/1025/fd/9: Permission denied
...
Cannot stat file /proc/1025/fd/126: Permission denied
```
Running it as root I don't get the permission denied error. However, re-running `fscrypt lock test/` still doesn't work. I make sure I close all files I open with Ctrl+Q. The thumbnails for the files are already generated. When it is "locked" in this state, I can see all the folder names and files, even the thumbnails, but I can't actually open or view any of them.
```
Error opening file. Required key not available.
```
This is what `fscrypt status test/` says:

```
"test/" is encrypted with fscrypt.

Policy: f307c445aef870630f1d56a6e272320c
Options: padding:32 contents:AES_256_XTS filenames:AES_256_CTS policy_version:2
Unlocked: Partially (incompletely locked)

Protected with 1 protector:
PROTECTOR LINKED DESCRIPTION
c140495356242008 No custom protector "Test"
```

Arch Linux
linux 6.7.4.arch1-1
fscrypt version v0.3.4

When I reboot, the folders are properly locked and nothing inside is visible. But unlocking results in the same issue. Have to keep rebooting.