Option key malfunction during remote connections from Apple Silicon to Intel Macs

[organicCPU]

Does anyone else have the strange issue, that the Option key of an Apple Silicon Mac doesn't work as expected during remote connections and screen sharing, especially while connected with older Intel Mac models?

All other keys do what they should, but character combinations that need the Option key to be pressed, simply won't appear. The Keyboard Viewer on the remote Intel Mac shows that the Option key is pressed. I can then enter the character, while holding down the Option key and pressing the desired key on the Keyboard Viewer. Pressing the physical key on the internal keyboard of a M3 PowerBook (macOS 14.x) or on an external Magic Keyboard with Touch ID and Numeric Keypad doesn't work during remote sessions over local and remote networks. Screen Sharing app and Apple Remote Desktop are affected.

Any comments are appreciated, also from MR members that aren't affected by the issue.

 

[organicCPU]

Still have this issue with macOS Sonoma 14.7.5. Using standard US keyboard layout, it's more an issue of inaccessible characters, except at key 1. With other keyboard layouts, I even experience more key remappings on different keyboard locations. Here is a comparison of keys pressed directly on macOS Sierra 10.12.6 on the left triplet and the same keys pressed from macOS Sonoma 14.7.5 on the right triplet through Apple Remote Desktop:

US
1*2*3*   4*5*6*
§ § ±    § § ±
1 ! ⁄    1 ¡
2 ™ €    2
3 £ ‹    3 £
4 ¢ ›    4 ¢
5 ∞ %    5
6 § fl    6 §
7 ¶ ‡    7 ¶
8 • °    8   °
9 ª ·    9 ª ·
0 º ‚    0 º
- – —    - –
= ≠ ±    = ≠ ±
q œ Œ    q
w ∑ „    w
e ´ ´    e ´ ´
r ® ‰    r ®
t † ˇ    t
y ¥ Á    y ¥ Á
u ¨ ¨    u ¨ ¨
i ˆ ˆ    i ˆ
o ø Ø    o ø Ø
p π ∏    p  
[ “ ”    [ “
] ‘ ’    ] ‘
a å Å    a å Å
s ß Í    s ß Í
d ∂ Î    d   Î
f ƒ Ï    f   Ï
g © ˝    g ©
h ˙ Ó    h   Ó
j ∆ Ô    j   Ô
k ˚     k  
l ¬ Ò    l ¬ Ò
; … Ú    ; … Ú
' æ Æ    ' æ Æ
\ « »    \ « »
` ` `    ` ` `
z Ω ¸    z   ¸
x ≈ ˛    x
c ç Ç    c ç Ç
v √ ◊    v
b ∫ ı    b
n ˜ ˜    n ˜
m µ Â    m µ Â
, ≤ ¯    ,   ¯
. ≥ ˘    .
/ ÷ ¿    / ÷ ¿

French
= ≠ ±    = — ±

German
0 ≠ ¯    0 ' ¯
. … ÷    . œ ÷
- – —    - ¿

1* direct plain keypress on macOS 10.12.6
2* direct keypress with Option key on macOS 10.12.6
3* direct keypress with Option AND Shift key on macOS 10.12.6
4* remote plain keypress from macOS 14.7.5 at macOS 10.12.6
5* remote keypress with Option key from macOS 14.7.5 at macOS 10.12.6
6* remote keypress with Option AND Shift key from macOS 14.7.5 at macOS 10.12.6

Any keystrokes left out, didn't react to the key combination.
Both Macs use the same Keyboard layout.
The keyboard is functioning fine.
Not anyone else having that issue out there?