global gnd! shots to gnd
Embedding global gnd! in a standard cell is just stupid.
gnd! needs to be your top level simulation testbench ground
reference, and any node inside an IC is guaranteed not to be,
if you care about L and/or R in any way. Standard cells
should use gndd! (digital global "ground") and then you can
"break" the nets with a presistor or something.
Maybe you have to do this to your layout (add a metal
resistor, or something - messy if you have a web of ground
bus straps, all needing cut).
Your other option is to continue living a lie, and call your
analog ground (gnda!) "gnd!" as well.