[Bug] Shell code color issue after specific line

Reproducible in vscode.dev or in VS Code Desktop?

• Not reproducible in vscode.dev or VS Code Desktop

Reproducible in the monaco editor playground?

• Not reproducible in the monaco editor playground

Monaco Editor Playground Link

https://microsoft.github.io/monaco-editor/playground.html?source=v0.55.1#XQAAAAIWAgAAAAAAAABBqQkHQ5NjdMjwa-jY7SIQ9S7DNlzs5W-mwj0fe1ZCDRFc9ws9XQE0SJE1jc2VKxhaLFIw9vEWSxW3yscw0fINSAEiAKctgAboa7AaZZDHLgrLqPRv_fRv2RyIokydlTdTYccsu6v6jDrc8jQ8udHkJ3GaVuDm0KgqW-Z92BxNlQdwsKub2m5ESdIv7dSSqbzq9tcRyCa5ak0BsoPH6wZ7MQRmr_CVVfAnlkMgU6Kisi6Ndc094U7L0oOlkdKPTXLlYqFHpwFkTapUvLDVu4emTbHFDhZWOljeMePeapORluLVSXtTNjSbSmjcPDr21_WS4TCKrquLRmAGnC7GRRhqNt3hjsjg_2NMA8jacBFRsp8mzrYEd_lKsRGUW5G10Pvm0CGIpThm-W0steJWc-9TqyHVOVe2mNren62ZIt6fZy_E8mDfn3hLtZbEMoUrTN4A9LpJg5esbjV1VZ-Qt1qR2nHp-RTRc9b_MCjzPBBT9eH0_LeC2JfuaEtF98l0DQhn6xL_hdhS_oMCcWNUxAoUc_NTsUcnZUlyGnx0tUGKeP_NVsew

Monaco Editor Playground Code

const value = /* set from `myEditor.getModel()`: */ `#!/bin/bash

GIT_REPO=git@github.com:xxx/yyy.git
GIT_HOST= \$(echo "\$GIT_REPO" | sed -E 's/^.*@([^:/]+).*\$/\\1/')

DIR_NAME=\$(basename "\$GIT_REPO" .git)

cd /app/\${DIR_NAME}
git pull
pnpm install
rm -rf packages/e2e/test-results`;

// Hover on each property to see its docs!
const myEditor = monaco.editor.create(document.getElementById("container"), {
	value,
	language: "shell",
	automaticLayout: true,
});

Reproduction Steps

open reproduction link in the monaco editor playground

Actual (Problematic) Behavior

after GIT_HOST= $(echo "$GIT_REPO" | sed -E 's/^.*@([^:/]+).*$/\1/')
code color is not correct

Expected Behavior

show code color correctly

Additional Context

work as expected on vscode.dev

Start with the linked Monaco Editor Playground reproduction and inspect the shell code around the GIT_HOST assignment, especially the command substitution and sed expression. Compare the incorrect coloring with the expected screenshot and verify the same example renders correctly after the change; the issue does not name a source file or test to run.