High power usage when group or channel (only) visible

[temx]

When any channel or group is open, there's significant timer / CPU utilization, even if there are no animations visible or the window is out of focus or hidden. The symptoms are similar to #4854

This does not happen if a private (one-on-one) conversation is open, or nothing is open (just the conversation list). This happens on version 3.5.1 but goes way back (at least down to 3.4.3, likely earlier).

A monitoring utility confirms that nothing is being drawn to the screen (no visible animations are playing).

[stale[bot]]

Hey there!

This issue was inactive for a long time and will be automatically closed in 30 days if there isn't any further activity. We therefore assume that the user has lost interest or resolved the problem on their own.

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