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[Metal] NVFP4 tensor-scale (global_scale) not implemented — throws runtime error on Metal backend

Status: Open.

#3911 In ml-explore/mlx;

· dahai80 opened on Jul 24, 2026

[BUG] JACCL MeshImpl::recv spins forever on peer loss — silent hang, no timeout (UC)

Status: Open.

#3910 In ml-explore/mlx;

· Sofille65 opened on Jul 24, 2026

Batched (padded/masked) attention diverges from single-sequence on M5, not on M3 Max

Status: Open.

#3897 In ml-explore/mlx;

· mabaeyens opened on Jul 23, 2026

mx.get_peak_memory() significantly under-reports actual GPU memory footprint on Apple Silicon (Metal)

Status: Open.

#3896 In ml-explore/mlx;

· True2456 opened on Jul 23, 2026

[BUG] gather_qmm sorted-rhs path corrupt for K % 64 != 0 on M5/NAX: !align_K tail bounds the load with BK instead of the K remainder (affine + mxfp4)

Status: Open.

#3887 In ml-explore/mlx;

· pierre427 opened on Jul 21, 2026

Metal BufferCache: reuse window [size, size+2*page_size) defeats caching for monotonically growing allocations (naive KV-cache append pattern)

Status: Open.

#3886 In ml-explore/mlx;

· apocryphx opened on Jul 21, 2026

Metal SDPA: no fused path for head_dim=512 (vector or full kernel), and the fallback is silent

Status: Open.

#3885 In ml-explore/mlx;

· apocryphx opened on Jul 21, 2026

[BUG] Metal slice_update can use a stale array-valued start across command buffers

Status: Open.

#3880 In ml-explore/mlx;

· michaelellis003 opened on Jul 21, 2026

[CUDA] GLM-5.2/DeepseekV32 mxfp4 forward numerically wrong on Blackwell (sm_120/121/110), correct on Metal — individual ops fine, composed forward diverges ~25%

Status: Open.

#3879 In ml-explore/mlx;

· Stefanfindeisen opened on Jul 21, 2026

tree_unflatten silently misplaces values when integer-like keys collide (e.g. "01" vs "1")

Status: Open.

#3877 In ml-explore/mlx;

· ayaangazali opened on Jul 20, 2026

[CUDA] distributed all_sum barrier hangs in cu::AtomicEvent::wait on Blackwell (sm_121/sm_110) during warmup — ring sockets healthy

Status: Open.

#3876 In ml-explore/mlx;

· Stefanfindeisen opened on Jul 20, 2026

Intermittent corruption of small int32 arrays under long lazy accumulation chains + in-place slice updates + async_eval (batch KV cache bookkeeping)

Status: Open.

#3866 In ml-explore/mlx;

· nickbc31-sketch opened on Jul 17, 2026