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qwen3_5 example config leaves use_sdpa_with_kv_cache off, which costs 2x decode

Status: Open.

#22045 In pytorch/executorch;

· john-rocky opened on Aug 22, 2026

8da4w silently skips layers that do not divide the group size, and 8da8w is implemented but rejected by config validation

Status: Open.

#22044 In pytorch/executorch;

· john-rocky opened on Aug 22, 2026

no_rope_layer_interval is declared but never applied, and SmolLM3's own config sets it

Status: Open.

#22043 In pytorch/executorch;

· john-rocky opened on Aug 22, 2026

MLX backend: missing aten.native_group_norm and upsample_nearest2d fragment a diffusion UNet into 28 subgraphs

Status: Open.

#22017 In pytorch/executorch;

· msluszniak opened on Aug 21, 2026

MLX iOS: whisper-small bf16 uses ~6.7x its file size in RSS and is jetsam-killed, while every sibling stays under 2x

Status: Open.

#22016 In pytorch/executorch;

· msluszniak opened on Aug 21, 2026

[CoreML] Build failure on Ubuntu 26.04 LTS (ExecuTorch 1.4.1, GCC 15.2.0): missing <cstdint> in memory_buffer.hpp

Status: Open.

#22013 In pytorch/executorch;

· emr3ayas opened on Aug 21, 2026

SDPA decomposition does not preserve intermediate dtype for fp16/bf16 inputs

Status: Open.

#22012 In pytorch/executorch;

· oscarandersson8218 opened on Aug 21, 2026

CoreML delegate emits unloadable multi-method program (0x23 InvalidProgram); MLX and XNNPACK load the same graphs fine

Status: Open.

#21951 In pytorch/executorch;

· msluszniak opened on Aug 19, 2026

aten._fft_r2c has no portable kernel: program builds but fails to load with 0x14 OperatorMissing

Status: Open.

#21950 In pytorch/executorch;

· msluszniak opened on Aug 19, 2026

aten.bmm, aten.mul, aten._softmax doesn't get quantized/replaced with Cortex-M kernels in Transformer model

Status: Open.

#21943 In pytorch/executorch;

· Tharanga01 opened on Aug 19, 2026

Vulkan: conv2d_local_wg_size() classifies by shader name only, making its SlidingWindow branch unreachable

module: vulkanIssues related to the Vulkan delegate and code under backends/vulkan/Issues related to the Vulkan delegate and code under backends/vulkan/

Status: Open.

#21942 In pytorch/executorch;

· msluszniak opened on Aug 19, 2026

Vulkan: low-rate non-deterministic CNN output on Adreno, dependent on GPU power state; clean on Mali

module: vulkanIssues related to the Vulkan delegate and code under backends/vulkan/Issues related to the Vulkan delegate and code under backends/vulkan/

Status: Open.

#21939 In pytorch/executorch;

· msluszniak opened on Aug 19, 2026