diff --git a/CHANGES.md b/CHANGES.md
index cbcccc6b5..768e4c916 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -2,8 +2,10 @@
 
 ### ? - ?
 
-#### Fixes :wrench:
+##### Fixes :wrench:
 
+- Fixed a bug that could cause a `bad_any_cast` exception when trying to access glTF extensions on non-Windows platforms. This commonly popped up when loading tilesets with metadata.
+- Fixed a bug that caused the `GetInteger64` functions on `CesiumMetadataValue`, `CesiumPropertyArray`, and `CesiumPropertyTableProperty` to always return the default value on non-Windows platforms.
 - Fixed issue with `UCesiumGlobeAnchorComponent::GetEllipsoid` that caused compilation errors on some machines.
 
 ### v2.7.0 - 2024-07-01
diff --git a/Source/CesiumRuntime/Private/CesiumMetadataValue.cpp b/Source/CesiumRuntime/Private/CesiumMetadataValue.cpp
index 44580b035..140dce068 100644
--- a/Source/CesiumRuntime/Private/CesiumMetadataValue.cpp
+++ b/Source/CesiumRuntime/Private/CesiumMetadataValue.cpp
@@ -91,9 +91,9 @@ int64 UCesiumMetadataValueBlueprintLibrary::GetInteger64(
     int64 DefaultValue) {
   return std::visit(
       [DefaultValue](auto value) -> int64 {
-        return CesiumGltf::MetadataConversions<int64, decltype(value)>::convert(
-                   value)
-            .value_or(DefaultValue);
+        return CesiumGltf::MetadataConversions<int64_t, decltype(value)>::
+            convert(value)
+                .value_or(DefaultValue);
       },
       Value._value);
 }
diff --git a/Source/CesiumRuntime/Private/CesiumPropertyArrayBlueprintLibrary.cpp b/Source/CesiumRuntime/Private/CesiumPropertyArrayBlueprintLibrary.cpp
index f96fa4181..e9d6d6ec7 100644
--- a/Source/CesiumRuntime/Private/CesiumPropertyArrayBlueprintLibrary.cpp
+++ b/Source/CesiumRuntime/Private/CesiumPropertyArrayBlueprintLibrary.cpp
@@ -120,9 +120,9 @@ int64 UCesiumPropertyArrayBlueprintLibrary::GetInteger64(
           return defaultValue;
         }
         auto value = v[index];
-        return CesiumGltf::MetadataConversions<int64, decltype(value)>::convert(
-                   value)
-            .value_or(defaultValue);
+        return CesiumGltf::MetadataConversions<int64_t, decltype(value)>::
+            convert(value)
+                .value_or(defaultValue);
       },
       array._value);
 }
diff --git a/Source/CesiumRuntime/Private/CesiumPropertyTableProperty.cpp b/Source/CesiumRuntime/Private/CesiumPropertyTableProperty.cpp
index a3aba9f56..fa8a6117c 100644
--- a/Source/CesiumRuntime/Private/CesiumPropertyTableProperty.cpp
+++ b/Source/CesiumRuntime/Private/CesiumPropertyTableProperty.cpp
@@ -969,7 +969,7 @@ int64 UCesiumPropertyTablePropertyBlueprintLibrary::GetInteger64(
         auto maybeValue = v.get(FeatureID);
         if (maybeValue) {
           auto value = *maybeValue;
-          return CesiumGltf::MetadataConversions<int64, decltype(value)>::
+          return CesiumGltf::MetadataConversions<int64_t, decltype(value)>::
               convert(value)
                   .value_or(DefaultValue);
         }
diff --git a/extern/CMakeLists.txt b/extern/CMakeLists.txt
index c38c16a4d..b31a54cea 100644
--- a/extern/CMakeLists.txt
+++ b/extern/CMakeLists.txt
@@ -54,11 +54,11 @@ set(CMAKE_RELWITHDEBINFO_POSTFIX ${CESIUM_RELEASE_POSTFIX})
 # On Mac and Linux, Unreal uses -fvisibility-ms-compat.
 # On Android, it uses -fvisibility=hidden
 if (${CMAKE_SYSTEM_NAME} STREQUAL "Linux" OR ${CMAKE_SYSTEM_NAME} STREQUAL "Darwin")
-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fvisibility-ms-compat -fvisibility-inlines-hidden")
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fvisibility-ms-compat -fvisibility-inlines-hidden -fno-rtti")
 elseif (${CMAKE_SYSTEM_NAME} STREQUAL "Android")
-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fvisibility=hidden -fvisibility-inlines-hidden")
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fvisibility=hidden -fvisibility-inlines-hidden -fno-rtti")
 elseif (${CMAKE_SYSTEM_NAME} STREQUAL "iOS")
-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fvisibility=hidden")
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fvisibility=hidden -fno-rtti")
 elseif (${CMAKE_SYSTEM_NAME} STREQUAL "Windows")
   # Unreal Engine adds /Zp8 in 64-bit Windows builds to align structs to 8 bytes instead of the
   # default of 16 bytes. There's this nice note in the documentation for that option: