1. Without seeing code and a live page, no, we cannot tell you the reason. It can be literally anything.
2. This group discusses the Developer Tools feature of Google Chrome. It is not a general web development support group.
3. After exausting other options (
stackoverflow.com, general bug research) without a solution, use
crbug.com to report issues (look for an existing issue there first). You can reply with a link to the found or created issue.
Please, other than replying with a link to the issue - do not continue this thread further.