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Spamming shift and moving the cursor makes the client lag

(#3161) Bug Confirmed performance
by Emma~xoxo

Observed behaviour

Client lags and slowly "catches up" to the present.

Reproduction steps

  1. Spam shift while hovering between at least two distinct messages

Build information

Canary Web 2026.605.11941, Linux (x64), Firefox 152.0, Locale fr

Platform

Web

Details

Expected behaviour Client should not lag.
2026.07.06_20_48_001.mp4 | 43 kB
  1. Rex changed the status from Needs triage to Confirmed

2 comments

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Comment by mesub
mesubMod 1 vote
Can't reproduce CNR: Canary Desktop 2026.606.140333, Web 2026.605.11941, Windows 11 10.0.26200 (x64), Electron 41.2.2, Chrome 146.0.7680.188, Node 24.14.1, Locale en-GB
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Comment by ternera
terneraMod 1 vote
Can reproduce CR, Linux-specific - Canary Desktop 2026.602.31138, Web 2026.605.11941, Linux 7.0.12-1-cachyos (x64), Electron 41.2.2, Chrome 146.0.7680.188, Node 24.14.1, Locale en-US
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