Different sync speeds on Android

Operating system

Android

Joplin version

3.4.7

Desktop version info

Joplin 3.3.12 (prod, linux)

Device: linux, Intel(R) Core(TM) Ultra 9 185H
Client-ID: f3fa606f26dc4ee99a69b54f5df69545
Sync-Version: 3
Profil-Version: 47
Unterstützter Schlüsselbund: Nein
Alternative instance ID: -

Backup: 1.4.2
Conflict Resolution: 1.2.3
Extra Markdown editor settings: 1.11.0
Favorites: 1.3.2
Freehand Drawing: 2.14.0
Inline tags: 1.3.0
Joplin Calendar: 1.2.0
Markdown Prettier: 0.1.0
Markdown table calculations: 1.0.5
Markdown Table: Colorize: 1.2.0
Markdown Table: Sortable: 1.3.0
Math Mode: 0.8.2
Menu items, Shortcuts, Toolbar icons: 1.1.0
Note encryption: 1.1.1
Note list and sidebar toggle buttons: 1.0.3
Outline: 1.5.14
Quick HTML tags: 0.2.0
Reset Checkboxes: 1.1.2
Rich Markdown: 0.16.2
Tagging: 1.0.3
Text Colorize: 1.2.5

Sync target

Joplin Server

Editor

Markdown Editor

What issue do you have?

I have very different sync speeds on Android. Is that normal?

On mobile network:

First sync after launching the app: > 30 seconds (without any changed notes).
Deleting a note: <2-3 seconds
Manual syncing: > 30 seconds
Creating a new note: > 30 seconds

On wifi

First sync after launching: > 30 seconds
Manual syncing < 2 seconds
Creating a new note: < 2 seconds
After display-timeout: > 30 seconds

On openSUSE Tumbleweed (on wifi or mobile network) all synchronization is very fast.

I run a Joplin-Server (3.3.13) in a docker on a Raspberry Pi 4.

I initially thought it might be due to my network setup, but it's much faster on my laptop with the same setup.