When running the latest firtool with both --export-module-hierarchy and --repl-seq-mem flags, the sram names transformation might only happen in one place.
This manifests as in the smems.conf, there is only name rob_debug_inst_mem_ext ..., but in the model hierarchy json, the module only exists as rob_debug_inst_mem.
This can be verified as running the following commands in the chipyard repo at main branch after initializing the repo with https://chipyard.readthedocs.io/en/main/Chipyard-Basics/Initial-Repo-Setup.html.
make verilog USE_CHISEL7=1 CONFIG=MediumBoomV3Config
Note the curious thing is that this works for the first 17 sram transformation, just not for the last one. Let me know what I can help to diagnose this issue.