Nevertheless, I have updated and the error remains when working with theme project structure (which probably is the most used for medium and large projects) I will drop this video here of me showing the error https://www.loom.com/share/d3f437347c8f4d5aa4dd1c7ce08e1bf9
PD: I will leave the video for a while in case it is helpful for someone to understand the problem and reproduce it. I will need to delete the video after few weeks 
NOTE: I also tried with renaming back to topic-list-item.raw.hbs instead topic-list-item.hbr and the issue is the same.