Hmmmmmmmm, I have tried upgrading to 2.11 and now get this in the logs (on all requests):
[mf:err] OPTIONS /v2/staff/wsauth?rnd=14084505647541512: TypeError: Failed to parse URL from [object Object]
at new Request (/home/aarhus/backend/node_modules/undici/lib/fetch/request.js:76:15)
at new Request (/home/aarhus/backend/node_modules/miniflare/node_modules/@miniflare/core/src/standards/http.ts:393:13)
at EventTarget.dispatchFetch (/home/aarhus/backend/node_modules/miniflare/node_modules/@miniflare/core/src/index.ts:1061:51)
at processTicksAndRejections (node:internal/process/task_queues:96:5)
at Server.<anonymous> (/home/aarhus/backend/node_modules/@miniflare/http-server/src/index.ts:298:20)
[mf:err] Cause: TypeError: Invalid URL
at new NodeError (node:internal/errors:387:5)
at URL.onParseError (node:internal/url:564:9)
at new URL (node:internal/url:640:5)
at new Request (/home/aarhus/backend/node_modules/undici/lib/fetch/request.js:74:21)
at new Request (/home/aarhus/backend/node_modules/miniflare/node_modules/@miniflare/core/src/standards/http.ts:393:13)
at EventTarget.dispatchFetch (/home/aarhus/backend/node_modules/miniflare/node_modules/@miniflare/core/src/index.ts:1061:51)
at processTicksAndRejections (node:internal/process/task_queues:96:5)
at Server.<anonymous> (/home/aarhus/backend/node_modules/@miniflare/http-server/src/index.ts:298:20)
OPTIONS /v2/staff/wsauth?rnd=14084505647541512 500 Internal Server Error (45.07ms)