Middle click autoscrolling still pastes

Reproduction steps

On the Linux desktop client, enable the "Use autoscrolling" option here: fluxer://settings/user?tab=advanced_settings&section=advanced-settings-accessibility
Copy some text somewhere
Go to a channel you can send messages in and press middle click

Expected behaviour

Middle click should autoscroll

Actual behaviour

Middle click does autoscroll, but also pastes

Build information

Canary Desktop 2026.1015.145307, Web 2026.1015.145307, Linux 7.2.10-200.fc44.x86_64 (x64), Electron 44.4.1, Chrome 152.0.7977.78, Node 24.21.0, Locale en-US

Platform

Linux