I created a reproduction for a Next.js project with support for MDX files: https://github.com/chrisweb/eslint-import-resolver-typescript_mdx_reproduction

After migrating to eslint-import-resolver-typescript 3.8.x a new "import/no-unresolved" linting error started to appear

It could be related to #363 (if there is a PR to fix 363 I will check if it also solves the problem mentioned here)

I was hoping the #360 PR (from the #359 ticket) would fix the problem but it did not