If you have a sparked conductor in un-powered stasis wall, when an EMP is activated, the sparked parts will still turn to BREL and other byproducts.
How to Reproduce the Bug:
1. Draw a square of STASIS WALL.
2. Draw a line of INST (or any other conductor affected by an EMP) through it with part of it exposed.
3. Power the INST.
4. Activate the STASIS WALL so that there is solid spark.
5. Activate the EMP.
6. You will notice that the SPRK turns to BREL and other byproducts of an EMP.
I know this has to do with the coding of EMP (it just searches for any applicable conductors on the canvas), but if it is in STASIS WALL, it shouldn't be affected by EMP.