High CPU usage and text cursor flickering when password field is focused in firefox 68

Solution In Progress - Updated -

Issue

  • In Firefox 68 on GNOME desktop, if a text cursor is moved to a password field, the cursor flickers and CPU usage of gnome-shell, firefox, and ibus-daemon increases suddenly, and sometimes it is difficult to input a password. This issue is likely to occur when both "English (US)" and "Japanese (Kana Kanji)" are configured as input sources.

Environment

  • Red Hat Enterprise Linux 7.6 and later
  • Firefox 68
  • gnome-shell 3.28

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