Blink 18.6.2 on iOS 26.6 copies only last ~35 lines of long selection

[gwestray15]

Checklist

• Using latest version on the App Store
• Read the docs
• Searched for existing GitHub issues

Configuration

Describe the bug

[hiSandog]

The ~35-line boundary could come from visual viewport rows, wrapped-line selection, or a fixed terminal buffer slice, so a reproducible matrix would help: 300 short lines, long wrapped lines, Unicode, and selecting across scrollback with/without tmux. Copying through Blink's keyboard command versus the iOS selection menu may also exercise different APIs. A regression should assert both byte content and first/last line so a fix does not merely increase the cutoff.

[gwestray15]

The ~35-line boundary could come from visual viewport rows, wrapped-line selection, or a fixed terminal buffer slice, so a reproducible matrix would help: 300 short lines, long wrapped lines, Unicode, and selecting across scrollback with/without tmux. Copying through Blink's keyboard command versus the iOS selection menu may also exercise different APIs. A regression should assert both byte content and first/last line so a fix does not merely increase the cutoff.

I completed the full test matrix and every method failed the same way.

Environment:

• iPhone 16 Pro
• iOS 26.6
• Blink 18.6.2
• No tmux and with tmux

Tests performed:

• seq 1 300
• 300 long wrapped lines
• 300 Unicode lines
• Native iOS Copy menu
• Blink on-screen Command/⌘ + C
• With tmux
• Without tmux

Result:
Every test copied only the tail end of the selection, roughly the last 35–45 lines. The beginning of the selected range was discarded.

Example:

• Full selection visually covered lines 1–300
• Paste into Apple Notes began around line 255–265
• Paste ended at line 300

Because both the native iOS copy path and Blink’s ⌘C path fail, and the failure reproduces with and without tmux, wrapped text, and Unicode, this appears to be a Blink scrollback-selection buffer regression rather than an application clipboard limit.

This workflow worked previously on the same device.

[gwestray15]

The update for blink resolved the issue with the latest ios 27 update it is back again.