Schrodinger's blank cell. What causes this value to echo differently than others when referenced.

d3:e7 are data entered

g3 down to g7 is

=TEXTSPLIT(TEXTJOIN(",",,D3&","&SUBSTITUTE(E3,",",","&D3&",")),",")

m3 is

=G3:K8 and as expected, blank cells convert to zeros

look at n6 it is not a zero... but-- look at the formulas below as applied to h6

it's not 'blank' (i14/k14) but it is equal to a blank cell (i17/k17)

what is it? if I click it- it lights up as a spill cell from the left.. but why didn't it make n6 as a zero? (which is what caught my eye)

(edit, and you are all NUTS with your convoluted solutions to