diff --git a/sentry-logback/src/test/kotlin/io/sentry/logback/SentryAppenderTest.kt b/sentry-logback/src/test/kotlin/io/sentry/logback/SentryAppenderTest.kt
index 4217954be1..96c3dad9f1 100644
--- a/sentry-logback/src/test/kotlin/io/sentry/logback/SentryAppenderTest.kt
+++ b/sentry-logback/src/test/kotlin/io/sentry/logback/SentryAppenderTest.kt
@@ -77,6 +77,7 @@ class SentryAppenderTest {
     @BeforeTest
     fun `clear MDC`() {
         MDC.clear()
+        Sentry.close()
     }
 
     @Test
diff --git a/sentry/src/main/java/io/sentry/Breadcrumb.java b/sentry/src/main/java/io/sentry/Breadcrumb.java
index fcd9407993..ddb19e5052 100644
--- a/sentry/src/main/java/io/sentry/Breadcrumb.java
+++ b/sentry/src/main/java/io/sentry/Breadcrumb.java
@@ -22,6 +22,8 @@ public final class Breadcrumb implements JsonUnknown, JsonSerializable, Comparab
   /** A timestamp representing when the breadcrumb occurred. */
   private final @NotNull Date timestamp;
 
+  private final @NotNull Long nanos;
+
   /** If a message is provided, its rendered as text and the whitespace is preserved. */
   private @Nullable String message;
 
@@ -46,10 +48,12 @@ public final class Breadcrumb implements JsonUnknown, JsonSerializable, Comparab
    * @param timestamp the timestamp
    */
   public Breadcrumb(final @NotNull Date timestamp) {
+    this.nanos = System.nanoTime();
     this.timestamp = timestamp;
   }
 
   Breadcrumb(final @NotNull Breadcrumb breadcrumb) {
+    this.nanos = System.nanoTime();
     this.timestamp = breadcrumb.timestamp;
     this.message = breadcrumb.message;
     this.type = breadcrumb.type;
@@ -663,8 +667,11 @@ public void setUnknown(@Nullable Map<String, Object> unknown) {
   @Override
   @SuppressWarnings("JavaUtilDate")
   public int compareTo(@NotNull Breadcrumb o) {
-    // TODO also use nano time if equal
-    return timestamp.compareTo(o.timestamp);
+    int timestampCompare = timestamp.compareTo(o.timestamp);
+    if (timestampCompare == 0) {
+      return nanos.compareTo(o.nanos);
+    }
+    return timestampCompare;
   }
 
   public static final class JsonKeys {
diff --git a/sentry/src/test/java/io/sentry/CombinedScopeViewTest.kt b/sentry/src/test/java/io/sentry/CombinedScopeViewTest.kt
new file mode 100644
index 0000000000..38023da18e
--- /dev/null
+++ b/sentry/src/test/java/io/sentry/CombinedScopeViewTest.kt
@@ -0,0 +1,72 @@
+package io.sentry
+
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+class CombinedScopeViewTest {
+
+    @Test
+    fun `adds breadcrumbs from all scopes in sorted order`() {
+        val options = SentryOptions()
+        val globalScope = Scope(options)
+        val isolationScope = Scope(options)
+        val scope = Scope(options)
+
+        val combined = CombinedScopeView(globalScope, isolationScope, scope)
+
+        globalScope.addBreadcrumb(Breadcrumb.info("global 1"))
+        isolationScope.addBreadcrumb(Breadcrumb.info("isolation 1"))
+        scope.addBreadcrumb(Breadcrumb.info("current 1"))
+
+        globalScope.addBreadcrumb(Breadcrumb.info("global 2"))
+        isolationScope.addBreadcrumb(Breadcrumb.info("isolation 2"))
+        scope.addBreadcrumb(Breadcrumb.info("current 2"))
+
+        val breadcrumbs = combined.breadcrumbs
+        assertEquals("global 1", breadcrumbs.poll().message)
+        assertEquals("isolation 1", breadcrumbs.poll().message)
+        assertEquals("current 1", breadcrumbs.poll().message)
+        assertEquals("global 2", breadcrumbs.poll().message)
+        assertEquals("isolation 2", breadcrumbs.poll().message)
+        assertEquals("current 2", breadcrumbs.poll().message)
+    }
+
+    @Test
+    fun `oldest breadcrumbs are dropped first`() {
+        val options = SentryOptions().also { it.maxBreadcrumbs = 5 }
+        val globalScope = Scope(options)
+        val isolationScope = Scope(options)
+        val scope = Scope(options)
+
+        val combined = CombinedScopeView(globalScope, isolationScope, scope)
+
+        globalScope.addBreadcrumb(Breadcrumb.info("global 1"))
+        isolationScope.addBreadcrumb(Breadcrumb.info("isolation 1"))
+        scope.addBreadcrumb(Breadcrumb.info("current 1"))
+
+        globalScope.addBreadcrumb(Breadcrumb.info("global 2"))
+        isolationScope.addBreadcrumb(Breadcrumb.info("isolation 2"))
+        scope.addBreadcrumb(Breadcrumb.info("current 2"))
+
+        val breadcrumbs = combined.breadcrumbs
+//        assertEquals("global 1", breadcrumbs.poll().message) <-- was dropped
+        assertEquals("isolation 1", breadcrumbs.poll().message)
+        assertEquals("current 1", breadcrumbs.poll().message)
+        assertEquals("global 2", breadcrumbs.poll().message)
+        assertEquals("isolation 2", breadcrumbs.poll().message)
+        assertEquals("current 2", breadcrumbs.poll().message)
+
+        scope.addBreadcrumb(Breadcrumb.info("current 3"))
+        scope.addBreadcrumb(Breadcrumb.info("current 4"))
+
+        val breadcrumbs2 = combined.breadcrumbs
+//        assertEquals("global 1", breadcrumbs.poll().message) <-- was dropped
+//        assertEquals("isolation 1", breadcrumbs2.poll().message) <-- dropped
+//        assertEquals("current 1", breadcrumbs2.poll().message) <-- dropped
+        assertEquals("global 2", breadcrumbs2.poll().message)
+        assertEquals("isolation 2", breadcrumbs2.poll().message)
+        assertEquals("current 2", breadcrumbs2.poll().message)
+        assertEquals("current 3", breadcrumbs2.poll().message)
+        assertEquals("current 4", breadcrumbs2.poll().message)
+    }
+}