Comment 6 for bug 194910

No, they are not directly related in my opinion.

There is one other issue that may be related: Bug 342658.
However, I opted to add this bug as a new one since it is addressing the issue of losing focus when switching between registers.
Bug 342658 is addressing the issue of the moving between fields without highlighting the target field.

Of course, it may turn out in the end that they are directly related.