Thank you @User according to my research in the haystack of numbers ,

+ tc1 = {-1.47e-3-5e-7*sky130_fd_pr__res_xhigh_po__var_mult*rsheet}

where:

sky130_fd_pr__res_xhigh_po__var_mult = '1.25000e+00*ic_res'

and:

ic_res = 0.0

so evaluating tc1=0 is not a simulator fault, its the expression result.... at least to my best understanding.