SparkleShare doesn't ask for password on encrypted repository

If I add an existing, client-side encrypted Git repository to a new SparkleShare installation (flatpak), the client doesn't asks for the encryption password. After fetching the files in the temporary directory, the client shows directly the final dialog of the setup wizard.

What happened:

Git repository on own server is added. Files in SparkleShare directory are encrypted.

What I expected to happen:

Git repository on own server is added. Files in SparkleShare directory are not encrypted.

flatpak list -d

Ref                                             Origin  Active commit Latest commit Installed size Options       
org.sparkleshare.SparkleShare/x86_64/stable     flathub d8666467ac7d  -             575,6 MB       system,current
org.freedesktop.Platform.VAAPI.Intel/x86_64/1.6 flathub 818a1504fad1  -               8,7 MB       system,runtime
org.freedesktop.Platform.ffmpeg/x86_64/1.6      flathub b5f77229b85f  -               7,7 MB       system,runtime
org.gnome.Platform/x86_64/3.24                  flathub 425f63d3d6b3  -               1,3 GB       system,runtime

Log file:

22:20:48 Environment | SparkleShare 2.0.1 (Flatpak)
22:20:48 Environment | Git LFS 2.3.0
22:20:48 Environment | Git 2.14.1
22:20:48 Environment | GNOME (Unix 4.16.0.2)
22:20:48 Cmd |  | gvfs-set-attribute "/home/felix/SparkleShare" metadata::custom-icon-name org.sparkleshare.SparkleShare
22:21:12 Fetcher | /home/felix/.config/org.sparkleshare.SparkleShare/tmp/DIRNAME-crypto | Fetching folder: ssh://storage@HOST/home/storage/DIRNAME-crypto
22:21:12 Auth | Fetching host key for HOST
22:21:12 Cmd |  | ssh-keyscan -t rsa -p 22 HOST
22:21:12 Auth | Skipping fingerprint check
22:21:12 Cmd | tmp | git ls-remote --heads "ssh://storage@HOST/home/storage/DIRNAME-crypto"
22:21:13 Cmd | tmp | git clone --progress --no-checkout "ssh://storage@HOST/home/storage/DIRNAME-crypto" "/home/felix/.config/org.sparkleshare.SparkleShare/tmp/DIRNAME-crypto"
22:21:13 Git | Cloning into '/home/felix/.config/org.sparkleshare.SparkleShare/tmp/DIRNAME-crypto'...
22:21:14 Git | remote: Counting objects: 10410, done.        
22:25:53 Git | remote: Total 10410 (delta 4701), reused 2188 (delta 109)        
22:25:56 Fetcher | Finished
22:25:56 Cmd | DIRNAME-crypto | git rev-parse HEAD
22:25:56 Cmd | DIRNAME-crypto | git config core.autocrlf input
22:25:56 Cmd | DIRNAME-crypto | git config core.quotepath false
22:25:56 Cmd | DIRNAME-crypto | git config core.ignorecase false
22:25:56 Cmd | DIRNAME-crypto | git config core.filemode false
22:25:56 Cmd | DIRNAME-crypto | git config core.precomposeunicode true
22:25:56 Cmd | DIRNAME-crypto | git config core.safecrlf false
22:25:56 Cmd | DIRNAME-crypto | git config core.excludesfile ""
22:25:56 Cmd | DIRNAME-crypto | git config core.packedGitLimit 128m
22:25:56 Cmd | DIRNAME-crypto | git config core.packedGitWindowSize 128m
22:25:56 Cmd | DIRNAME-crypto | git config pack.deltaCacheSize 128m
22:25:56 Cmd | DIRNAME-crypto | git config pack.packSizeLimit 128m
22:25:56 Cmd | DIRNAME-crypto | git config pack.windowMemory 128m
22:25:56 Cmd | DIRNAME-crypto | git config push.default matching
22:25:56 Cmd | DIRNAME-crypto | git config filter.lfs.required true
22:25:56 Cmd | DIRNAME-crypto | git config filter.lfs.clean 'git-lfs clean %f'
22:25:56 Cmd | DIRNAME-crypto | git config filter.lfs.smudge "env GIT_SSH_COMMAND='ssh -i /home/felix/.config/org.sparkleshare.SparkleShare/ssh/2016-12-24_11h29.key -o UserKnownHostsFile=/home/felix/.config/org.sparkleshare.SparkleShare/ssh/known_hosts -o IdentitiesOnly=yes -o PasswordAuthentication=no -F /dev/null' git-lfs smudge %f"
22:25:56 Cmd | DIRNAME-crypto | git rev-parse HEAD
22:25:56 Cmd | DIRNAME-crypto | git show-ref --verify --quiet refs/heads/SparkleShare
22:25:57 Cmd | DIRNAME-crypto | git checkout --quiet --force HEAD
22:26:00 Config | Wrote to '/home/felix/.config/org.sparkleshare.SparkleShare/projects.xml'
22:26:00 /home/felix/SparkleShare/HOST/DIRNAME-crypto | Initializing...
22:26:00 Cmd | DIRNAME-crypto | git config core.ignorecase false
22:26:00 Cmd | DIRNAME-crypto | git config remote.origin.url "ssh://storage@HOST/home/storage/DIRNAME-crypto"
22:26:00 Cmd | DIRNAME-crypto | git config core.sshCommand ssh -i /home/felix/.config/org.sparkleshare.SparkleShare/ssh/2016-12-24_11h29.key -o UserKnownHostsFile=/home/felix/.config/org.sparkleshare.SparkleShare/ssh/known_hosts -o IdentitiesOnly=yes -o PasswordAuthentication=no -F /dev/null
22:26:00 Cmd | DIRNAME-crypto | git --no-pager log --since=1.month --raw --find-renames --date=iso --format=medium --no-color --no-merges
22:26:00 Git | DIRNAME-crypto | Checking for remote changes...
22:26:00 Cmd | DIRNAME-crypto | git rev-parse HEAD
22:26:00 Cmd | DIRNAME-crypto | git config core.ignorecase true
22:26:00 Cmd | DIRNAME-crypto | git config core.ignorecase false
22:26:00 Cmd | DIRNAME-crypto | git rev-parse --abbrev-ref HEAD
22:26:00 Cmd | DIRNAME-crypto | git ls-remote --heads --exit-code origin master
22:26:01 Git | DIRNAME-crypto | No remote changes, local+remote: 094d8d84124ffc774d1d0c9a6b7398c930068a29
22:26:01 Cmd | DIRNAME-crypto | git status --porcelain