diff --git a/impeller/renderer/backend/vulkan/allocator_vk.cc b/impeller/renderer/backend/vulkan/allocator_vk.cc
index 23df6c1688140..1ba4202125b44 100644
--- a/impeller/renderer/backend/vulkan/allocator_vk.cc
+++ b/impeller/renderer/backend/vulkan/allocator_vk.cc
@@ -168,16 +168,12 @@ static constexpr VmaMemoryUsage ToVMAMemoryUsage() {
 }
 
 static constexpr VkMemoryPropertyFlags ToVKMemoryPropertyFlags(
-    StorageMode mode,
-    bool is_texture) {
+    StorageMode mode) {
   switch (mode) {
     case StorageMode::kHostVisible:
-      if (is_texture) {
-        return VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT;
-      } else {
-        return VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT |
-               VK_MEMORY_PROPERTY_HOST_COHERENT_BIT;
-      }
+      // See https://github.com/flutter/flutter/issues/128556 . Some devices do
+      // not have support for coherent host memory so we don't request it here.
+      return VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT;
     case StorageMode::kDevicePrivate:
       return VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT;
     case StorageMode::kDeviceTransient:
@@ -236,7 +232,7 @@ class AllocatedTextureSourceVK final : public TextureSourceVK {
     VmaAllocationCreateInfo alloc_nfo = {};
 
     alloc_nfo.usage = ToVMAMemoryUsage();
-    alloc_nfo.preferredFlags = ToVKMemoryPropertyFlags(desc.storage_mode, true);
+    alloc_nfo.preferredFlags = ToVKMemoryPropertyFlags(desc.storage_mode);
     alloc_nfo.flags = ToVmaAllocationCreateFlags(desc.storage_mode, true);
 
     auto create_info_native =
@@ -366,8 +362,7 @@ std::shared_ptr<DeviceBuffer> AllocatorVK::OnCreateBuffer(
 
   VmaAllocationCreateInfo allocation_info = {};
   allocation_info.usage = ToVMAMemoryUsage();
-  allocation_info.preferredFlags =
-      ToVKMemoryPropertyFlags(desc.storage_mode, false);
+  allocation_info.preferredFlags = ToVKMemoryPropertyFlags(desc.storage_mode);
   allocation_info.flags = ToVmaAllocationCreateFlags(desc.storage_mode, false);
 
   VkBuffer buffer = {};
diff --git a/impeller/renderer/backend/vulkan/device_buffer_vk.cc b/impeller/renderer/backend/vulkan/device_buffer_vk.cc
index e9859ff9390a5..cb84dcd5eff38 100644
--- a/impeller/renderer/backend/vulkan/device_buffer_vk.cc
+++ b/impeller/renderer/backend/vulkan/device_buffer_vk.cc
@@ -46,6 +46,9 @@ bool DeviceBufferVK::OnCopyHostBuffer(const uint8_t* source,
   if (source) {
     ::memmove(dest + offset, source + source_range.offset, source_range.length);
   }
+  // See https://github.com/flutter/flutter/issues/128556 . Some devices do not
+  // have support for coherent host memory and require an explicit flush.
+  ::vmaFlushAllocation(allocator_, allocation_, offset, source_range.length);
 
   return true;
 }