Hi, we are facing an issue in the step index 20 fastroute. It produces:

[INFO GRT-0102] Iteration 33

[INFO GRT-0126] Overflow report:

[INFO GRT-0127] Total usage          : 1517743

[INFO GRT-0128] Max H overflow       : 33

[INFO GRT-0129] Max V overflow       : 37

[INFO GRT-0130] Max overflow         : 37

[INFO GRT-0131] Number overflow edges: 21204

[INFO GRT-0132] H   overflow         : 143426

[INFO GRT-0133] V   overflow         : 131566

[INFO GRT-0134] Final overflow       : 274992

[INFO GRT-0102] Iteration 34

[ERROR GRT-0169] Invalid index for position (167, 204).

Error: or_groute.tcl, 63 GRT-0169

[ERROR]: during executing: "openroad -exit /openLANE_flow/scripts/openroad/or_groute.tcl |& tee >&@stdout /project/openlane/core/runs/core/logs/routing/20-fastroute.log"

[ERROR]: Exit code: 1

[ERROR]: Last 10 lines:

child process exited abnormally

What can we do to fix it?