[iOS, Bluetooth keyboard] { and } movement doesn't work

[lebigot]

On a French Bluetooth keyboard on iOS (18.6), the { and } movement keys (in normal mode) do not move the cursor as normal, but instead insert the corresponding character.

I observe this problem in (iOS) Safari on the test site. As a point of comparison, doing the same does work in Firefox on Windows 11 (on a French keyboard, too, where } involves AltGr).

Here is the sequence printed by the site (for iOS in Safari):

164 text
163 keypress } Minus
162 handleKey <A-}>
161 keydown } Minus
160 handleKey
159 keydown Alt AltLeft
158 keypress Escape Escape

Maybe this is part of a more general issue with handling (non-US?) external keyboards and characters with dead/modifier keys in normal mode? The following were fixed, in the past, for instance:

1. Replacing a character (r) doesn't work with two-key characters (^+o = ô, etc.) #125
2. Backtick (move to mark) doesn't work with French Mac keyboard #91

Thanks!