Unicode escape characters not recognized

For example, in my custom keymapping (to be loaded with loadkeys), I map ctrl shift k to ctrl shift k:

control keycode 37 = F232
string F232 = "\033[107;6u"

The syntax is nicely explained here if necessary.
Vim understands this keycode, but micro raw doesn't and instead prints

EventKey: Alt-[: "\x1b["
EventKey: 1: "1"
EventKey: 0: "0"
EventKey: 7: "7"
EventKey: ;: ";"
EventKey: 6: "6"

Contrary example with Ctrl-Leftarrow:

control shift keycode 105 = F200
string F200 = "\033[1;6D"

micro raw correctly says EventKey: Ctrl-Shift-Left: "\x1b[1;6D".

Specifications:
Version: 2.0.8
Commit hash: cfcb2e45
Terminal: TTY Linux console. That's why I am using a custom keymapping. But I also reproduced this behavior with Xterm: In the above linked stackexchange answer, you can find the steps on how to do that. It's the same issue here: sending left works, sending k does not.

Start by reproducing the mappings in micro raw on the Linux console or Xterm, comparing the F232 sequence with the working F200 sequence. Trace how micro parses the escape sequence and recognize the Unicode-style key event so the input is reported as Ctrl-Shift-K rather than individual characters.