The Chain Sampler reads one conditioning entry per SCENE
(scene_conditionings = positive[:max_scenes]). When Studio stopped discarding
the entries past the first of a wired CONDITIONING — the fix for a reference
surviving while the prompt did not — those entries reached the sampler
untagged, and the r2v reference block was counted as a scene of its own. The
run sampled the shot twice, which from outside is "the model ran a second pass
for no reason".
Studio tags every pass-through entry as a companion; the sampler excludes
companions when counting scenes and hands them to every scene instead, so they
still reach the model. Both halves of the original bug stay fixed: nothing is
dropped, and nothing is mistaken for a scene.
Also fixes the liked-conditioning blend, which was the last payload path still
doing a raw lerp: _v2_shape_compatible ignores sequence length by design, so a
direction learned at 586 positions met a 494-position prompt, threw, and took
the whole pull toward what the user rated well with it. Routed through
_v2_payload_like like every other payload.
Adds stage timers for the nine learning steps the first pass did not cover —
55% of a 26.9s run was accounted for, and the rest was unnamed.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
"conditioning memory failed (size of tensor a (492) must match tensor b
(499))" — the compatibility gate checks the channel width and the batch
and deliberately not the sequence length, so the payload passed and the
lerp threw. On LTX the encoder pads to a fixed length and this never
happened; Qwen does not pad, so on H3 the length moves with every prompt
edit and the entire learned direction was dropped for that run.
_resize_conditioning_sequence_like was already in the file for exactly
this, with zero callers. Both the blend and the repel now use it, and say
once when a payload had to be resampled.
An exact-length payload is untouched, so the common case — same prompt,
re-rolled — stays bit-exact.
