Reverse requests do have a 'seq' set still from VSCode. I incorrectly interpreteddede7bb4b7/src/vs/workbench/contrib/debug/common/abstractDebugAdapter.ts (L65)to mean they have a 'seq' of '0', however the 'seq' is set in 'internalSend' heredede7bb4b7/src/vs/workbench/contrib/debug/common/abstractDebugAdapter.ts (L178). Removing the check that 'seq=0' on reverse requests and updating the dap_server.py impl to also set the seq.