Vivaldi close multiple tabs confirmation box bug

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Describe the bug
With Vivaldi closing multiple tabs i get a popup asking if im sure, this box seems to align weirdly, if the window is aligned in a left position tile the popup opens top right however if i align the window in a right position tile the popup opens 50% outside the desktop

To Reproduce
Steps to reproduce the behaviour:

1. Align Vivaldi to a tile thats aligned to the right side/border of the desktop
2. have multiple tabs opened and hit close
3. The popup now opens 50% outside the desktop

Screenshots
3 screenshots, one is with a normal centered tile that "touches" both sides of the desktop, and the other two shows the alignment bug, where the popup aligns differently based of which side of the desktop it "touches".

Information (please complete the following):

• Tiling Shell version: 17.3
• GNOME version: 50.1
• Vivaldi version: 8.0.4033.35 (Official Build) (64-bit) (installed via official Manjaro repo)

Additional context
I tried disabling the extension and aligning left/right and the problem is gone

Thanks