xkb：为什么在系统更新（OpenSuSE 15.2 → 15.3）后撰写键设置为 NoSymbol？

将我的 OpenSuSE Leap 从 15.2 升级到 15.3 后，我发现 Compose 键（键码：135）不再起作用。实际上，xev不再将其识别为Multi_key，而是NoSymbol：

KeyPress event, serial 40, synthetic NO, window 0x7800001,
    root 0x561, subw 0x0, time 8470151, (923,367), root:(923,396),
    state 0x10, keycode 135 (keysym 0x0, NoSymbol), same_screen YES,
    XLookupString gives 0 bytes: 
    XmbLookupString gives 0 bytes: 
    XFilterEvent returns: False

注意：该键实际上标有Compose，因为它是 Sun Type 7 键盘的一部分。在$XKB/keycodes/evdev文件中，我有这两行代码（其中第二行已被我禁用，因为它适用于带有菜单键的常规 PC 键盘）：

<COMP> = 135;
// alias <MENU> = <COMP>;

该$XKB/symbols/compose文件已使用以下块升级：

partial modifier_keys
xkb_symbols "comp" {
    key <COMP>  { type[Group1]="TWO_LEVEL", [ Multi_key, Multi_key ] };
};

当前setxkbmap配置如下所示：

╭─jacek@epica ~  
╰─➤  setxkbmap -print -verbose 10                                         127 ↵
Setting verbose level to 10
locale is C
Trying to load rules file ./rules/evdev...
Trying to load rules file /usr/share/X11/xkb/rules/evdev...
Success.
Applied rules from evdev:
rules:      evdev
model:      pc105
layout:     de
variant:    pl
options:    compose:comp,terminate:ctrl_alt_bksp,altwin:meta_win,lv3:ralt_switch
Trying to build keymap using the following components:
keycodes:   evdev+aliases(qwertz)
types:      complete
compat:     complete
symbols:    pc+de(pl)+inet(evdev)+terminate(ctrl_alt_bksp)+altwin(meta_win)+level3(ralt_switch)+terminate(ctrl_alt_bksp)
geometry:   pc(pc105)
xkb_keymap {
        xkb_keycodes  { include "evdev+aliases(qwertz)" };
        xkb_types     { include "complete"      };
        xkb_compat    { include "complete"      };
        xkb_symbols   { include "pc+de(pl)+inet(evdev)+terminate(ctrl_alt_bksp)+altwin(meta_win)+level3(ralt_switch)+terminate(ctrl_alt_bksp)"  };
        xkb_geometry  { include "pc(pc105)"     };
};

我可以compose:comp很清楚地看到这个选项。所以：这里有什么问题？