What steps will reproduce the problem?
1. Open a code review, for example https://chromium-review.googlesource.com/c/chromium/src/+/673124
2. Click "Show diffs"
3. Scroll down to the first file, and click on the last line of code shown for the first file (clicking on the number is fine, clicking on the code is broken).

What is the expected output?

No scrolling.

What do you see instead?

Window will scroll to a (random?) position.


I bisected to:

You are probably looking for a change made after 503703 (known good), but no later than 503704 (first known bad).
CHANGELOG URL:
The script might not always return single CL as suspect as some perf builds might get missing due to failure.
  https://chromium.googlesource.com/chromium/src/+log/aaea11cf400c7c2af3f1e9dab3a2519f616c4c89..8adb99901d515d445cc398bf78e8b1accedc0613