@vaike_peeter thanks for your report. I have identified why re-initialising the probe when it was already taking readings caused a reset and I have implemented a fix for that.
I was speaking from my personal experience BUT as I have no intention of using the SZP for setting the Z=0 Datum, I have done no testing of that feature.
I'm "old school", I install BLTouch units for setting the Z=0 Datum.
I can't tell very much from your diagram because I can't see how far the SZP control board is from the hot end. If in doubt, put a layer of glass fibre tape or similar thermal insulation behind the control board to shield it from the heat.