Doing Windows + Print Screen sometimes results in <EMPTY> status

**Describe the bug**

There is an inconsistent but frequent bug where when I do Windows + Print Screen, while the image is copied to my system clipboard as expected, it does not go into CopyQ, and the top status bar updates to ``, while this is inaccurate.

**To Reproduce**

1. Do Windows + Print Screen repeatedly until you can reproduce
2. Observe how sometimes the status changes to ``

**Expected behavior**
The image is always visible in CopyQ`

**Version, OS and Environment**
CopyQ 15.0.0
Arch: x86_64-little_endian-llp64
Audio: miniaudio 0.11.25
Compiler: MSVC
KNotifications: 6.23.0
KStatusNotifierItem: 6.23.0
OS: Windows 11 Version 25H2
QCA: 2.3.10
Qt: 6.10.2
QtKeychain: 0.15.0
has-audio: 1
has-encryption: 1
has-global-shortcuts: 1
has-keychain: 1
has-mouse-selection: 0

**Additional context**
[2026-05-27 18:18:48.558] Warning : [qt.qpa.mime] Retrying to obtain clipboard.