Caused by {rBa6a9a12e8f32}
Other relevant commits:
rBb8ca806b7798e2f8dd6effca8f0d081b3cd8c23f
rBde530a95dc7b482dc22c933b9b8b2a98c79b5663
The issue is caused by some leftover BONE_TRANSFORM_MIRROR flags on a bone from previous runs (file in the report had the flag still on forearm.R).
With these false leftover flags still set, `pose_grab_with_ik()` cannot work correctly.
Culprit commit above removed the early clearing of this flag on all bones, this should be restored [and happens in`count_set_pose_transflags()`].
This should only be done in the beginning of the transform process [when called from `createTransPose()`] -- see below.
In the process of transforming, BONE_TRANSFORM_MIRROR is set/cleared at other places as well:
- `recalcData_objects` / `pose_transform_mirror_update` (clears flags on all bones again)
- `recalcData_objects` / `pose_transform_mirror_update` (set flags on relevant bones -- see comment /* Set flag to let autokeyframe know to keyframe the mirrred bone. */)
- `special_aftertrans_update` via `count_set_pose_transflags()`this happened in`count_set_pose_transflags()`].
So as we can see `count_set_pose_transflags()` is called again very late in the process -- in `special_aftertrans_update` -- and this time we should not clear the flag on the bones.This should only be done in the beginning of the transform process, so now still clear the flags early in 'createTransPose()' [but dont restore this in 'count_set_pose_transflags()' -- this will be called from `special_aftertrans_update` again, so placing the clearance here only complicates things (`autokeyframe_pose()` still needs to work as well)...]
Otherwise `autokeyframe_pose()` will not pick them up for keyframing correctly.