Windows from Workspace 1 visible on all workspaces (with given pre-conditions)

[Jazzhoo]

Distribution

Mint 22.1 Cinnamon

Package version

6.4.6

Graphics hardware in use

Intel Core Ultra 5 125 U, iGPU

Frequency

Always

Bug description

The windows opened on one workspace are show on another workspaces.
Exactly like when the "Always on visible workspace" setting was on. But it wasn't

The windows are visible on another workspaces but are not controllable i.e clicking on them doesn't focus.

That issue was not present in Linux Mint 22.

Steps to reproduce

Pre-condition 1: Connect external monitor - in my case through usb-c dock
Pre-condition 2: Set workspaces to be on primary screen only
Pre-condition 3: Set up a few workspaces - in my case 4

1. Open some windows on the primary monitor - Workspace 1. i.e. nemo and terminal
2. Switch to the next/previous workspace with Ctrl+Alt+ arrow
3. Observe the anomaly

Expected behavior

I expect to not see the windows form another workspaces unless the "always on visible workspace" option is selected.

Additional information

I have testes in my current system: 22.1 updated from 22 through the official update manager.
I have also tested on clean 22.1 live usb and the issue is the same.

[beecroftm]

I'm also experiencing this issue.

3 monitors and 3 workspaces:-

System: Kernel: 6.8.0-51-generic arch: x86_64 bits: 64 compiler: gcc v: 13.3.0 clocksource: tsc
Desktop: Cinnamon v: 6.4.6 tk: GTK v: 3.24.41 wm: Muffin v: 6.4.1 vt: 7 dm: LightDM v: 1.30.0
Distro: Linux Mint 22.1 Xia base: Ubuntu 24.04 noble
Machine: Type: Desktop System: Alienware product: Alienware Aurora R8 v: 1.0.26
CPU: Info: 8-core model: Intel Core i9-9900K bits: 64 type: MT MCP smt: enabled arch: Coffee Lake
Drives: Local Storage: total: 476.94 GiB used: 154.86 GiB (32.5%)
Memory: total: 64 GiB available: 62.62 GiB used: 10.11 GiB (16.1%)
Processes: 445 Power: uptime: 16h 13m states: freeze,mem,disk suspend: deep wakeups: 0

[beecroftm]

These changes seemed to fix the issue, though of course they reset my window manager preferences:

1. Reset Muffin Settings: dconf reset -f /org/cinnamon/muffin/
2. Restart Muffin: muffin --replace &
3. Restart machine

[stzer]

I'm also experiencing this issue too. The problem occurs randomly, there is no obvious pattern.

3 monitors and 6 workspaces.

OS: Manjaro Linux
Kernel: 6.6.65-1-MANJARO
DE: Cinnamon 6.4.2
WM: Mutter (Muffin)
CPU: AMD Ryzen 7 5700X (16)
GPU: NVIDIA GeForce GTX 1660 SUPER