Appiimage Mounting issue

Hi, I have installed few appimages and I don't know what cause that:
```
~$ df -h
df: /tmp/.mount_appimalRPr2t: Drugi koniec nie jest połączony
df: /tmp/.mount_appimatXBEFC: Drugi koniec nie jest połączony
df: /tmp/.mount_appimawJ25gM: Drugi koniec nie jest połączony
```
`Drugi koniec nie jest połączony` = `The other end is not connected`

I have also notification pointing me to that github AppimageKit site. There's many folders like that in /tmp/ in every minute. How to stop that? I remove appimage launcher but doesn't help. Maybe when I try appimage app some backup solution?
Regards,
Przemek