diff --git a/src/chat/chat_poll.c b/src/chat/chat_poll.c
index e3264141..51f72baa 100644
--- a/src/chat/chat_poll.c
+++ b/src/chat/chat_poll.c
@@ -1,5 +1,6 @@
 #include "chat_poll.h"
 #include "chat_feedback.h"
+#include "member_sync.h"
 #include "chat_core_priv.h"
 #include "chat_event.h"
 #include "../utun_instance.h"
@@ -120,6 +121,10 @@ int chat_feedback_snapshot(struct UTUN_INSTANCE* inst, const char* channel, cons
     sqlite3_bind_blob(st, 1, message_id, 32, SQLITE_STATIC);
     while ((step = sqlite3_step(st)) == SQLITE_ROW) {
         uint64_t author = (uint64_t)sqlite3_column_int64(st, 0), ver = (uint64_t)sqlite3_column_int64(st, 2);
+        uint8_t author_key[32];
+        enum ms_author_status status = member_sync_author_key(inst, channel, author, author_key);
+        if (status == MS_AUTHOR_ERROR) goto done;
+        if (status != MS_AUTHOR_ACTIVE) continue;
         const uint8_t* data = sqlite3_column_blob(st, 3); size_t len = sqlite3_column_bytes(st, 3);
         int kind = sqlite3_column_int(st, 1);
         if (kind == CHAT_FEEDBACK_REACTION) {
@@ -191,6 +196,11 @@ void chat_feedback_check_message(struct UTUN_INSTANCE* inst, const char* channel
     if (sqlite3_prepare_v2(inst->topo_sqlite_db, sql, -1, &st, NULL) != SQLITE_OK) { poll_db_error(inst, "evaluate query"); return; }
     sqlite3_bind_blob(st, 1, message_id, 32, SQLITE_STATIC); int step; unsigned accepted = 0, rejected = 0;
     while ((step = sqlite3_step(st)) == SQLITE_ROW) {
+        uint8_t author_key[32];
+        enum ms_author_status status = member_sync_author_key(inst, channel,
+            (uint64_t)sqlite3_column_int64(st, 0), author_key);
+        if (status == MS_AUTHOR_ERROR) { sqlite3_finalize(st); return; }
+        if (status != MS_AUTHOR_ACTIVE) continue;
         struct chat_poll_answer answer;
         if (chat_answer_decode(sqlite3_column_blob(st, 2), sqlite3_column_bytes(st, 2), &answer) < 0
             || !is_poll || !poll_answer_allowed(&poll, &answer)) {
diff --git a/src/chat/member_sync.c b/src/chat/member_sync.c
index d8d65690..6dae5f65 100644
--- a/src/chat/member_sync.c
+++ b/src/chat/member_sync.c
@@ -1,5 +1,6 @@
 #include "../routing_layer/topo_group_connect.h"
 #include "member_sync.h"
+#include "chat_feedback.h"
 
 #include "../routing_layer/topo_node_sqlite.h"
 #include "../routing_layer/topo_group.h"
@@ -740,6 +741,8 @@ static int member_apply_record(struct UTUN_INSTANCE* inst, const char* ch_id,
 
     /* ── recompute и подтвердить реальное изменение по хешу ── */
     if (changed) {
+        /* Общий ключ может разрешить удостоверения приглашённых в других каналах. */
+        if (chat_feedback_member_update(inst, m->node_id) < 0) return MT_ERR_IO;
         int rc = merkle_sync_recompute_path(inst, MT_DATA_MEMBERS, ch_id, m->node_id);
         if (rc < 0) return -1;
         if (rc == 0) changed = 0; /* запись была no-op (данные идентичны) */
@@ -752,6 +755,7 @@ static int member_apply_record(struct UTUN_INSTANCE* inst, const char* ch_id,
 
 void member_sync_record_committed(struct UTUN_INSTANCE* inst, const char* ns, uint64_t node_id) {
     merkle_sync_changed(inst, MT_DATA_MEMBERS, ns);
+    chat_feedback_member_committed(inst, node_id);
     struct TOPO_GROUP* g = inst->topo_groups ? topo_groups_find(inst->topo_groups, strtoull(ns, NULL, 10)) : NULL;
     struct ETCP_CONN* conn = instance_find_conn(inst, node_id);
     if (g && g->group_type == TOPO_GROUP_TYPE_CHAT) {
@@ -946,7 +950,8 @@ int member_sync_verify_and_purge(struct UTUN_INSTANCE* inst, const char* ch_id)
     for (int i = 0; i < count; i++) if (topo_node_sqlite_member_del(db, ns, removed[i]) < 0) goto fail;
     stage = "index";
     for (int i = 0; i < count; i++)
-        if (merkle_sync_recompute_path(inst, MT_DATA_MEMBERS, ns, removed[i]) < 0) goto fail;
+        if (merkle_sync_recompute_path(inst, MT_DATA_MEMBERS, ns, removed[i]) < 0
+            || chat_feedback_member_update(inst, removed[i]) < 0) goto fail;
     stage = "commit";
     rc = sqlite3_exec(db, "COMMIT", NULL, NULL, NULL);
     if (rc != SQLITE_OK) goto fail;
@@ -956,6 +961,7 @@ int member_sync_verify_and_purge(struct UTUN_INSTANCE* inst, const char* ch_id)
     }
     for (int i = 0; i < count; i++) {
         uint64_t nid = removed[i];
+        chat_feedback_member_committed(inst, nid);
         radio_forget_member_mute(inst, group_id, nid);
         struct TOPO_GROUP* g = inst->topo_groups ? topo_groups_find(inst->topo_groups, group_id) : NULL;
         struct ETCP_CONN* conn = instance_find_conn(inst, nid);