iPadOS: Fast typing with hardware keyboard + Chinese Pinyin deletes characters after the cursor

On iPad, connect Apple’s hardware keyboard and switch to the built-in Chinese Pinyin (Simplified) input method.
Open any note (issue also occurs in restricted mode / new on-device vault).
Place the cursor in the middle of a line so there is existing text after it.
Type Pinyin quickly and commit candidates continuously.
Issue
A few random characters AFTER the cursor are deleted during fast typing. Video attached.
Notes
Only happens when there is text after the cursor on the same line; typing at the end of a line is fine.
May NOT happen with the on-screen keyboard.
Does NOT happen in other apps or in Safari text fields with the same keyboard and IME.
Independent of note length.
Tried: restricted mode (all community plugins off), Source mode instead of Live Preview, disabling spellcheck / auto-pair / smart indent, disabling sync. No change.

Input method: built-in Chinese Pinyin

Thank you for your attention.

SYSTEM INFO:
Obsidian version: 1.13.7 (365)
API version: 1.13.7
Operating system: iOS 26.5.2 (Apple iPad13,8)
Login status: logged in
Language: zh
Catalyst license: none
Live preview: off
Base theme: adapt to system
Community theme: none
Snippets enabled: 0
Restricted mode: off
Plugins installed: 1
Plugins enabled: 1
1: Remotely Save v0.5.25
RECOMMENDATIONS:
Community plugins: for bugs, please first try updating all your plugins to latest. If still not fixed, please try to make the issue happen in the Sandbox Vault or disable community plugins.

ScreenRecording_09-30-2026 03-24-40_1.zip (9.0 MB)

This keyboard software are you sue? The one built into iOS or something else?