Fonant
October 5, 2026, 9:35am
1
In the last week or so I can’t use Bambu Studio on my Linux (Fedora 44) machine. The Home page fails to load, and the same for the Login page: which means I can’t attach to my printer.
At the same time, four WebKitWebProcess processes start and continue to run at 100% CPU, which isn’t ideal!
Others seem to have the same problem:
opened 02:37PM - 29 Sep 26 UTC
### Bambu Studio Version
2.06.00.51 (official AppImage) and also reproduced earl… ier with Flatpak 2.8.x
### Where is the application from?
Official AppImage + Flathub Flatpak (both affected)
### OS version
Ubuntu 24.04.5 LTS (X11 / ubuntu-xorg)
### Additional system information
- Kernel: Linux 7.0.0-34-generic
- GPU: Intel Meteor Lake-P
- WebKitGTK: libwebkit2gtk-4.1-0 2.52.6-0ubuntu0.24.04.1
- Region / Cloudflare PoP: GIG (Brazil)
### Printer
Bambu Lab printers (cloud + LAN access codes present)
### How to reproduce
1. On 2026-09-28 morning, Bambu Studio Home / Online Models / account login and cloud printers worked normally on this Ubuntu machine.
2. Same afternoon (no Ubuntu package update of Bambu/WebKit that day), Home / Online Models / sign-in started failing.
3. Embedded WebView shows blank/black UI or Cloudflare “Just a moment…” / security verification and never completes.
4. Multiple `WebKitWebProcess` processes spawn and burn high CPU until the app is force-killed.
5. Dual-boot **Windows on the same PC / same network**: MakerWorld, login and cloud printers work normally.
6. Desktop Chrome on the same Ubuntu session: https://www.makerworld.com loads normally.
### Actual results
- MakerWorld / Online Models / cloud login unusable inside Studio on Linux.
- Non-browser clients receive Cloudflare managed challenge, e.g.:
```text
curl -I -L https://www.makerworld.com
HTTP/2 403
cf-mitigated: challenge
server: cloudflare
cf-ray: …-GIG
```
- Page body title: `Just a moment...`
- Same class of failure also hits bambulab.com sign-in from non-Chrome clients (`403` / challenge).
- Local slicing still works if Home/WebView is avoided; cloud printer list depends on login WebView and breaks with it.
### Expected results
Embedded WebKit (or an alternative WebView) should be able to complete Cloudflare verification the same way Chrome/Windows WebView2 do, or Studio should fall back so login + cloud devices remain usable without MakerWorld browsing.
### Notes / related
This matches the recurring Flatpak/WebKit vs Cloudflare pattern discussed previously (e.g. #6809, #7477, #10138): works in browser / Windows / macOS, fails in Linux embedded WebKit; can start suddenly when Cloudflare policy changes and status.bambulab.com still shows MakerWorld operational.
Please consider:
1. Cloudflare allowlisting / softer challenge for Studio WebView user-agents on Linux (as done previously for Flatpak).
2. Or migrate Linux cloud/login UI off WebKitGTK to a Chromium-based WebView.
3. A documented offline/LAN path that does not require opening MakerWorld Home on startup.
### Checklist of files to include
- [ ] Log file
- [ ] Project file