diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8026af6cce..b85851f815 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,12 @@
 
 ## 29.0.0
 
+## 28.0.2
+
+* `Core`:
+  * [#1001](https://github.com/InsanusMokrassar/ktgbotapi/issues/1001) - `[Bug] Invalid detection of isCausedByCancellation()`
+  * [#1002](https://github.com/InsanusMokrassar/ktgbotapi/issues/1002) - `Unable to handle UnauthorizedException with buildBehaviourWithLongPolling`
+
 ## 28.0.1
 
 * `Version`:
diff --git a/tgbotapi.behaviour_builder/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/behaviour_builder/BehaviourBuilders.kt b/tgbotapi.behaviour_builder/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/behaviour_builder/BehaviourBuilders.kt
index 38ae9a9d66..f6e7c7f14c 100644
--- a/tgbotapi.behaviour_builder/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/behaviour_builder/BehaviourBuilders.kt
+++ b/tgbotapi.behaviour_builder/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/behaviour_builder/BehaviourBuilders.kt
@@ -87,6 +87,7 @@ suspend fun TelegramBot.buildBehaviourWithLongPolling(
         timeoutSeconds = timeoutSeconds,
         autoDisableWebhooks = autoDisableWebhooks,
         autoSkipTimeoutExceptions = autoSkipTimeoutExceptions,
-        mediaGroupsDebounceTimeMillis = mediaGroupsDebounceTimeMillis
+        mediaGroupsDebounceTimeMillis = mediaGroupsDebounceTimeMillis,
+        exceptionsHandler = defaultExceptionsHandler
     )
 }
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/bot/ktor/base/DefaultKtorRequestsExecutor.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/bot/ktor/base/DefaultKtorRequestsExecutor.kt
index d2c683f09d..40ca65a261 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/bot/ktor/base/DefaultKtorRequestsExecutor.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/bot/ktor/base/DefaultKtorRequestsExecutor.kt
@@ -84,7 +84,7 @@ class DefaultKtorRequestsExecutor internal constructor(
 
                 when (e) {
                     is ClientRequestException -> {
-                        val exceptionResult = runCatching {
+                        val exceptionResult = runCatchingLogging(logger = Log) {
                             val content = e.response.bodyAsText()
                             val responseObject = jsonFormatter.decodeFromString(Response.serializer(), content)
                             newRequestException(
diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/utils/CausedByCancellation.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/utils/CausedByCancellation.kt
index 3b65f8071e..08c921dffc 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/utils/CausedByCancellation.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/utils/CausedByCancellation.kt
@@ -2,6 +2,17 @@ package dev.inmo.tgbotapi.utils
 
 import kotlinx.coroutines.CancellationException
 
+/**
+ * Traverses this throwable's cause chain to find a [CancellationException].
+ *
+ * It walks through `this` and its `cause`s until the first [CancellationException] is encountered,
+ * and returns that exception. If no [CancellationException] is found in the chain, returns `null`.
+ *
+ * This is useful when you need to distinguish cancellations from other failures while handling errors.
+ *
+ * @receiver the root [Throwable] to inspect
+ * @return the first [CancellationException] found in the cause chain, or `null` if none present
+ */
 fun Throwable.causedCancellationException(): CancellationException? {
     var current = this
     while (current !is CancellationException) {
@@ -15,4 +26,10 @@ fun Throwable.causedCancellationException(): CancellationException? {
     return current
 }
 
-fun Throwable.isCausedByCancellation(): Boolean = causedCancellationException() == null
+/**
+ * Checks whether this throwable (or any of its causes) is a [CancellationException].
+ *
+ * @receiver the [Throwable] to inspect
+ * @return `true` if a [CancellationException] is found in the cause chain, `false` otherwise
+ */
+fun Throwable.isCausedByCancellation(): Boolean = causedCancellationException() != null