As per Nvidia, the pad brick separates clock and data terminations.
This necessitates doing the calibration twice.
Nvidia/Nintendo probably never updated that part on T210 since it's from around
2015/2016. T210B01 is based on 2017 codebase so it has it.
HOS (nvservices, not boot) is probably updated to also do that.
If not, then they should fix it.
There are 0 known issue reports with that on T210, but well.