termux-notification - multiline doesn't work

Problem description
Termux notifications cuts the line and doesn't show strings that don't fit in a line. Using \n or piping to stdin as recommended here doesn't work either. In fact it looks like the piped value is ignored.

Steps to reproduce

ls $PREFIX | termux-notification --title 'Some folders'

Expected behavior
Wrap the strings that don't fit in a single line.

Additional information
Non-rooted device. Galaxy Note 8.

$ termux-info                                                 Updatable packages:
All packages up to date
Subscribed repositories:
https://dl.bintray.com/grimler/science-packages-21 science/stable
https://dl.bintray.com/grimler/game-packages-21 games/stable
https://termux.net stable/main
https://termux.net stable/main
System information:
Linux localhost 4.9.112-15119493 #2 SMP PREEMPT Thu May 30 19:02:31 KST 2019 aarch64 Android
Termux-packages arch:
aarch64
Android version:
9
Device manufacturer:
samsung
Device model:
SM-N960

The below image shows the of the above command results on my device.

Start at the termux-notification command entry point and trace how piped stdin and newline-containing text are passed into the Android notification. Reproduce the issue with ls $PREFIX | termux-notification --title 'Some folders'; done means the notification displays the complete input with lines wrapped instead of cutting it off.