bootstrap does not identify lines correctly for med-res data

As briefly mentioned during the last DRP telecon 2021-06-18, I am having difficulty generating a bootstrapped detectormap for medium-resolution data.

running bootstrapDetectorMap with arc visit=63106 (room_lights, no_screen) and flat visit=63050 with debug on:

bootstrapDetectorMap.py /projects/HSC/PFS/Subaru/ --calib /projects/HSC/PFS/Subaru/CALIB-SuNSS-2021-06-16 --rerun hassan/bstrapMed --flatId visit=63050 arm=m --arcId visit=63106 arm=m --debug

We see the line identification shown in figure 'bootstrap medRes.png'. The arc lines are clearly apparent, but the crosses do not match any of the lines.

This is in contrast to running the same task against DCB r data:

bootstrapDetectorMap.py /projects/HSC/PFS/Subaru/ --calib /projects/HSC/PFS/Subaru/CALIB-SuNSS-2021-06-16/ --rerun hassan/bstrapRed --flatId visit=30044 arm=r --arcId visit=30045 arm=r --debug

Where the lines are clearly identified. See figure 'bootstrap-red-DCB.png' .

Also no problems with identification noticed when using simulated arcs from the integration test.