Incorrect Z Height after for a few moves tool change
I've had plenty of successful prints over the last 6 months with my XL 2 extruder. I noticed in the last week or two that the z height starts incorrectly after each tool change. It moves through the first couple of moves a few mm above the correct location, then shifts to the correct height and proceeds with the rest of the layer normally. It happens for both extruders after switching from one to the other, but doesn't happen on new layers when a tool change doesn't occur. When I use a wipe tower, the error happens on the first part of the wipe tower before correcting itself. When I don't use a wipe tower, the error happens on the first part of each layer.
I have gone through all the recalibrations, confirmed that the g-code heights are consistent, looked for mistaken ramping parameters, searched google and still cant seem to find a culprit. Has this happened to anyone else and are there solutions?