**System Information**
OS: Windows 7 Professional 64 SP1
Graphics: Nvidia Quadro K2200
**Blender Version**
2.8 Beta, nightly March 25th 2019;
hash: adfdae3fc2f4
**Short description of error**
When Inverse Kinematic bone set up with target and pole, default pose changes every time 3d viewer transitions from edit into pose mode.
Seems to depend on viewpoint position in scene.
Pose resets to proper position when "rest position" turned on in properties - goes back to faulty position later.
NOTE: first observed after using symmetrize on an armature with ~60 bones; the original bones retained proper position. When reproduced in a scene as described below no copy/symmetrization was necessary to cause the effect.
**Exact steps for others to reproduce the error**
1. erase everything
2. Add armature
3. extrude enough bones (in my case 4+ at 90deg angle at the middle)
4. add inverse kinematic constraint to end bone in pose mode
5. add 2 bones to the armature for target and pole at eachend of IK bone;
5.1. target is connected to end of IK bone, pole is extruded from the opposite end, "detached" and moved slightly away
6. enter pose mode
7. TAB TAB TAB TAB TAB TAB TAB
8. rotate around bones
9. repeat step 7.
NOTE: for attached file only step 7 is necessary.
{F6887991}