Fix single key combos activating only once (#25198)

Co-authored-by: Julian Schuler <julianschuler@users.noreply.github.com>

2 files changed, 19 insertions, 2 deletions

diff --git a/tests/combo/test_combo.cpp b/tests/combo/test_combo.cpp
index d78ec55990..cc6425a94c 100644
--- a/tests/combo/test_combo.cpp
+++ b/tests/combo/test_combo.cpp
@@ -54,3 +54,18 @@ TEST_F(Combo, combo_osmshift_tapped) {
     tap_key(key_i);
     VERIFY_AND_CLEAR(driver);
 }
+
+TEST_F(Combo, combo_single_key_twice) {
+    TestDriver driver;
+    KeymapKey  key_a(0, 0, 1, KC_A);
+    set_keymap({key_a});
+
+    EXPECT_REPORT(driver, (KC_B));
+    tap_combo({key_a});
+    VERIFY_AND_CLEAR(driver);
+
+    EXPECT_REPORT(driver, (KC_B));
+    EXPECT_EMPTY_REPORT(driver);
+    tap_combo({key_a});
+    VERIFY_AND_CLEAR(driver);
+}
diff --git a/tests/combo/test_combos.c b/tests/combo/test_combos.c
index 8dcb364c6e..9a0465a9b4 100644
--- a/tests/combo/test_combos.c
+++ b/tests/combo/test_combos.c
@@ -4,14 +4,16 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 #include "quantum.h"
 
-enum combos { modtest, osmshift };
+enum combos { modtest, osmshift, single_key };
 
 uint16_t const modtest_combo[]  = {KC_Y, KC_U, COMBO_END};
 uint16_t const osmshift_combo[] = {KC_Z, KC_X, COMBO_END};
+uint16_t const single_key_combo[] = {KC_A, COMBO_END};
 
 // clang-format off
 combo_t key_combos[] = {
     [modtest]  = COMBO(modtest_combo, RSFT_T(KC_SPACE)),
-    [osmshift] = COMBO(osmshift_combo, OSM(MOD_LSFT))
+    [osmshift] = COMBO(osmshift_combo, OSM(MOD_LSFT)),
+    [single_key] = COMBO(single_key_combo, KC_B),
 };
 // clang-format on