Nothing with regard to this changed between 13 and 14, so if it was an issue it still would be, but there are other reasonable explanations here, the most relevant being that only combat robots flash when they're at critical heat.
In the case of other robots if you ever see similar behavior: They can't glow until that specific AI takes a turn (as that's when it will report its current heat to the map). It can also be easy to miss the flash, since it only occurs for the first two seconds.
And quad spread lasers. Wow