diff --git a/esphome/components/text_sensor/filter.cpp b/esphome/components/text_sensor/filter.cpp
index a242b43b1c..40a37febee 100644
--- a/esphome/components/text_sensor/filter.cpp
+++ b/esphome/components/text_sensor/filter.cpp
@@ -66,10 +66,14 @@ SubstituteFilter::SubstituteFilter(const std::initializer_list<Substitution> &su
     : substitutions_(substitutions) {}
 
 optional<std::string> SubstituteFilter::new_value(std::string value) {
-  std::size_t pos;
   for (const auto &sub : this->substitutions_) {
-    while ((pos = value.find(sub.from)) != std::string::npos)
+    std::size_t pos = 0;
+    while ((pos = value.find(sub.from, pos)) != std::string::npos) {
       value.replace(pos, sub.from.size(), sub.to);
+      // Advance past the replacement to avoid infinite loop when
+      // the replacement contains the search pattern (e.g., f -> foo)
+      pos += sub.to.size();
+    }
   }
   return value;
 }
diff --git a/esphome/components/wifi/wifi_component_esp8266.cpp b/esphome/components/wifi/wifi_component_esp8266.cpp
index a543628e27..274a505db2 100644
--- a/esphome/components/wifi/wifi_component_esp8266.cpp
+++ b/esphome/components/wifi/wifi_component_esp8266.cpp
@@ -872,7 +872,13 @@ bssid_t WiFiComponent::wifi_bssid() {
   return bssid;
 }
 std::string WiFiComponent::wifi_ssid() { return WiFi.SSID().c_str(); }
-int8_t WiFiComponent::wifi_rssi() { return WiFi.status() == WL_CONNECTED ? WiFi.RSSI() : WIFI_RSSI_DISCONNECTED; }
+int8_t WiFiComponent::wifi_rssi() {
+  if (WiFi.status() != WL_CONNECTED)
+    return WIFI_RSSI_DISCONNECTED;
+  int8_t rssi = WiFi.RSSI();
+  // Values >= 31 are error codes per NONOS SDK API, not valid RSSI readings
+  return rssi >= 31 ? WIFI_RSSI_DISCONNECTED : rssi;
+}
 int32_t WiFiComponent::get_wifi_channel() { return WiFi.channel(); }
 network::IPAddress WiFiComponent::wifi_subnet_mask_() { return {(const ip_addr_t *) WiFi.subnetMask()}; }
 network::IPAddress WiFiComponent::wifi_gateway_ip_() { return {(const ip_addr_t *) WiFi.gatewayIP()}; }
diff --git a/tests/components/lvgl/common.yaml b/tests/components/lvgl/common.yaml
index c70dd7568d..652ae7e7a1 100644
--- a/tests/components/lvgl/common.yaml
+++ b/tests/components/lvgl/common.yaml
@@ -115,8 +115,8 @@ wifi:
   password: PASSWORD123
 
 time:
-  platform: sntp
-  id: time_id
+  - platform: sntp
+    id: sntp_time
 
 text:
   - id: lvgl_text
diff --git a/tests/components/lvgl/lvgl-package.yaml b/tests/components/lvgl/lvgl-package.yaml
index eabceff9d9..5839643638 100644
--- a/tests/components/lvgl/lvgl-package.yaml
+++ b/tests/components/lvgl/lvgl-package.yaml
@@ -478,19 +478,19 @@ lvgl:
                   id: hello_label
                   text:
                     time_format: "%c"
-                    time: time_id
+                    time: sntp_time
               - lvgl.label.update:
                   id: hello_label
                   text:
                     time_format: "%c"
-                    time: !lambda return id(time_id).now();
+                    time: !lambda return id(sntp_time).now();
               - lvgl.label.update:
                   id: hello_label
                   text:
                     time_format: "%c"
                     time: !lambda |-
                         ESP_LOGD("label", "multi-line lambda");
-                        return id(time_id).now();
+                        return id(sntp_time).now();
             on_value:
               logger.log:
                 format: "state now %d"
diff --git a/tests/components/mqtt/common.yaml b/tests/components/mqtt/common.yaml
index 3f1b83bb01..284ac30337 100644
--- a/tests/components/mqtt/common.yaml
+++ b/tests/components/mqtt/common.yaml
@@ -4,6 +4,7 @@ wifi:
 
 time:
   - platform: sntp
+    id: sntp_time
 
 mqtt:
   broker: "192.168.178.84"
diff --git a/tests/components/uptime/common.yaml b/tests/components/uptime/common.yaml
index 86b764e7ff..279258c670 100644
--- a/tests/components/uptime/common.yaml
+++ b/tests/components/uptime/common.yaml
@@ -3,6 +3,7 @@ wifi:
 
 time:
   - platform: sntp
+    id: sntp_time
 
 sensor:
   - platform: uptime
diff --git a/tests/components/wireguard/common.yaml b/tests/components/wireguard/common.yaml
index cd7ab1075e..342ffa32f6 100644
--- a/tests/components/wireguard/common.yaml
+++ b/tests/components/wireguard/common.yaml
@@ -4,8 +4,10 @@ wifi:
 
 time:
   - platform: sntp
+    id: sntp_time
 
 wireguard:
+  time_id: sntp_time
   address: 172.16.34.100
   netmask: 255.255.255.0
   # NEVER use the following keys for your VPN -- they are now public!