[BUG]: Terminal resize causes repeated screen resets and flickering in Termux

[ancientcatz]

Describe the Bug

When using Flyline in Termux on Android, resizing the terminal causes the display to repeatedly reset and redraw, resulting in severe flickering.

The easiest way to reproduce this is by showing or hiding the Android soft keyboard, since Termux resizes the terminal automatically. However, the issue is not specific to the soft keyboard. Any terminal resize appears to trigger the same behavior.

The attached screen recording uses the soft keyboard only as a convenient way to demonstrate the problem.

Screenrecorder-2026-08-07-12-45-15-277.mp4

Expected behavior

A terminal resize should be handled as a normal resize event. Flyline should update its layout once as needed without repeatedly resetting the terminal or causing visible flickering.

Environment & Version Information

flyline 1.5.0
git hash: d437a50
build mode: release
build datetime: 2026-08-03T22:29:18Z
build target: aarch64-linux-android
rustc version: rustc 1.97.1 (8bab26f4f 2026-07-14)

Running in: Bash 5.3.15(1)-release
shell: /data/data/com.termux/files/usr/bin/bash

Running in: xterm-256color
program: unknown
program version: unknown
locale: en_US.UTF-8 (LC_ALL: unknown, LC_CTYPE: unknown)

Running in: Linux (kernel 4.19.157-perf-g79f9ecb73106 aarch64)
system linker: LLD 21.1.8 (compatible with GNU linkers)
dynamic linker: unknown

Running on: aarch64 architecture

Running in: a simulation

Debug Logs (Optional / If Necessary)

Full logs: paste.rs/xCjKz

Steps to Reproduce

1. Enable Flyline in Termux.
2. Trigger a terminal resize.
   • For example, show or hide the Android soft keyboard.
   • Any other action that changes the terminal dimensions produces the same result.
3. Observe the display during and after the resize.
4. Scroll through the terminal history to make the repeated redraws more noticeable.

[iSteeb]

i think this bug is more insidious than just a niche android terminal. experiencing similar in ghostty on ubuntu.

i’ve noticed the following behaviour quite regularly although it’s hard to determine if there’s an actual pattern to the commands it affects, or if it’s random.

i’ll execute, for example, docker ps. multi line output. then if my terminal resizes for any reason, that block will go blank. the multi line spacing is there, but blank. not in scroll back.

will report more if i can dig into it a bit more.

[Plyply99]

i think this bug is more insidious than just a niche android terminal. experiencing similar in ghostty on ubuntu.

i’ve noticed the following behaviour quite regularly although it’s hard to determine if there’s an actual pattern to the commands it affects, or if it’s random.

i’ll execute, for example, docker ps. multi line output. then if my terminal resizes for any reason, that block will go blank. the multi line spacing is there, but blank. not in scroll back.

will report more if i can dig into it a bit more.

I have same issue with ghostty. It happens with a resize event when the window is decreased in width. It basically clears the terminal screen leaving only the command prompt.

[iSteeb]

i can add that it was introduced in 1.4
1.3 was fine

[Plyply99]

i can add that it was introduced in 1.4 1.3 was fine

Yes it was fine 1.3. I've moved back to 1.3 till a fix is implemented.

[HalFrgrd]

Thanks for the detailed issue! I've manage to improve the resizing logic in the new release v1.6.0. For context I've been upgrading ratatui and rewriting the inline viewport mechanics to not require getting terminal position. This allows for noticeably faster startup over slow ssh connections.

Ill try and improve the resizing logic for other terminal emulators in a later release.

[HalFrgrd]

Ive improved the resize logic in v1.6.2 and I cant see any undesirable artifacts when resizing in termux!
let me know if you find anything else!