I’m not sure how to explain it, but will try.
I lost the tip of my index finger, almost to the first knuckle (from tip). The D chord uses all 4 fingers and with that, my index finger, because it is bigger on the end now, ends up touching other strings and getting in the way. Most hand postions I’ve been able to modify if they only use 3 fingers. This is the first time I’ve had to use all 4 fingers at the same time for the roll that is in the tab.
Hope that clears it up somewhat. sorry