We had a horrible time dealing with these, but there is a fix of sorts.
Open your project properties and drill down to lets say (as an example) field discreet instrument.
Click "Edit block..."
You'll notice that there is a dynamic linear property (looks like a dimension) that says "#(TargetObject.LoopNumber)" near the bottom of the block. You'll want to widen this as this is in reality your wipeout. Widen it as much as you want, but slightly less than the bubble line.
Close and save.
Back in autocad you should see that your wipeouts are fixed, but only for that particular instrument type.
To figure out which objects might contain this type of wipeout:
After selecting an object, in the properties pallette, if they object type is "ACPPDYNAMICASSET" it probably will have it. And you'll need to fix it. This includes most if not all instruments, control valves, pcvs, rotameters, etc, but for complex objects such as control valves, you'll have to edit the block that is part of the annotation. That is slightly more complicated. You'll need to locate where that annotation block is being pulled from and edit it there, repeating the steps as above.
Hope this helps.
