Bug: coverage for all methods in a file is missing

* **Version**: 7.11.3
* **Platform**: MacOS (on my computer) & Ubuntu (GitHub actions)
* **Repository**: https://github.com/shigma/cordis

All other files in this project are displayed normally, except for *service.ts*:

Coverage for all methods in this file was missing. Even if the code fragment is obviously to be covered, the coverage still behaved abnormal:



I have checked the sourcemap but it seems fine ([link](https://evanw.github.io/source-map-visualization/#NTM3AC8vIHNyYy9zZXJ2aWNlLnRzCnZhciBTZXJ2aWNlID0gY2xhc3MgewogIGNvbnN0cnVjdG9yKGN0eCwgbmFtZSwgaW1tZWRpYXRlKSB7CiAgICB0aGlzLmN0eCA9IGN0eDsKICAgIENvbnRleHQuc2VydmljZShuYW1lKTsKICAgIGlmIChpbW1lZGlhdGUpIHsKICAgICAgdGhpc1tDb250ZXh0LmltbWVkaWF0ZV0gPSBuYW1lOwogICAgfQogICAgY3R4Lm9uKCJyZWFkeSIsIGFzeW5jICgpID0+IHsKICAgICAgYXdhaXQgdGhpcy5zdGFydCgpOwogICAgICBjdHhbbmFtZV0gPSB0aGlzOwogICAgfSk7CiAgICBjdHgub24oImRpc3Bvc2UiLCBhc3luYyAoKSA9PiB7CiAgICAgIGN0eFtuYW1lXSA9IG51bGw7CiAgICAgIGF3YWl0IHRoaXMuc3RvcCgpOwogICAgfSk7CiAgfQogIHN0YXJ0KCkgewogIH0KICBzdG9wKCkgewogIH0KICBnZXQgY2FsbGVyKCkgewogICAgcmV0dXJuIHRoaXNbQ29udGV4dC5jdXJyZW50XSB8fCB0aGlzLmN0eDsKICB9Cn07CmV4cG9ydCB7CiAgU2VydmljZQp9OwovLyMgc291cmNlTWFwcGluZ1VSTD1pbmRleC5lanMubWFwCjExNTQAewogICJ2ZXJzaW9uIjogMywKICAic291cmNlcyI6IFsiLi4vc3JjL3NlcnZpY2UudHMiXSwKICAic291cmNlc0NvbnRlbnQiOiBbImltcG9ydCB7IEF3YWl0YWJsZSB9IGZyb20gJ2Nvc21va2l0J1xuLy8gaW1wb3J0IHsgQ29udGV4dCB9IGZyb20gJy4vY29udGV4dCdcblxuZXhwb3J0IGNsYXNzIFNlcnZpY2Uge1xuICBwcm90ZWN0ZWQgc3RhcnQoKTogQXdhaXRhYmxlPHZvaWQ+IHt9XG4gIHByb3RlY3RlZCBzdG9wKCk6IEF3YWl0YWJsZTx2b2lkPiB7fVxuXG4gIGNvbnN0cnVjdG9yKHByb3RlY3RlZCBjdHg6IENvbnRleHQsIG5hbWU6IHN0cmluZywgaW1tZWRpYXRlPzogYm9vbGVhbikge1xuICAgIENvbnRleHQuc2VydmljZShuYW1lKVxuXG4gICAgaWYgKGltbWVkaWF0ZSkge1xuICAgICAgdGhpc1tDb250ZXh0LmltbWVkaWF0ZV0gPSBuYW1lXG4gICAgfVxuXG4gICAgY3R4Lm9uKCdyZWFkeScsIGFzeW5jICgpID0+IHtcbiAgICAgIGF3YWl0IHRoaXMuc3RhcnQoKVxuICAgICAgY3R4W25hbWVdID0gdGhpc1xuICAgIH0pXG5cbiAgICBjdHgub24oJ2Rpc3Bvc2UnLCBhc3luYyAoKSA9PiB7XG4gICAgICBjdHhbbmFtZV0gPSBudWxsXG4gICAgICBhd2FpdCB0aGlzLnN0b3AoKVxuICAgIH0pXG4gIH1cblxuICBnZXQgY2FsbGVyKCk6IENvbnRleHQge1xuICAgIHJldHVybiB0aGlzW0NvbnRleHQuY3VycmVudF0gfHwgdGhpcy5jdHhcbiAgfVxufVxuIl0sCiAgIm1hcHBpbmdzIjogIjtBQUdPLG9CQUFjO0FBQUEsRUFJbkIsWUFBc0IsS0FBYyxNQUFjLFdBQXFCO0FBQWpEO0FBQ3BCLFlBQVEsUUFBUSxJQUFJO0FBRXBCLFFBQUksV0FBVztBQUNiLFdBQUssUUFBUSxhQUFhO0FBQUEsSUFDNUI7QUFFQSxRQUFJLEdBQUcsU0FBUyxZQUFZO0FBQzFCLFlBQU0sS0FBSyxNQUFNO0FBQ2pCLFVBQUksUUFBUTtBQUFBLElBQ2QsQ0FBQztBQUVELFFBQUksR0FBRyxXQUFXLFlBQVk7QUFDNUIsVUFBSSxRQUFRO0FBQ1osWUFBTSxLQUFLLEtBQUs7QUFBQSxJQUNsQixDQUFDO0FBQUEsRUFDSDtBQUFBLEVBbkJVLFFBQXlCO0FBQUEsRUFBQztBQUFBLEVBQzFCLE9BQXdCO0FBQUEsRUFBQztBQUFBLE1Bb0IvQixTQUFrQjtBQUNwQixXQUFPLEtBQUssUUFBUSxZQUFZLEtBQUs7QUFBQSxFQUN2QztBQUNGOyIsCiAgIm5hbWVzIjogW10KfQo=)).