I just bumped into this. I usually set up flight ACA 113 for a Toronto → Vancouver sim flight (have done for a long time in MSFS), but it is stopping me from putting in 113 as the number now. Because 113 was in there earlier, it changed it to *** to protect my gentle eyes.
I guess any flight with 113 might be filtered due to this unfortunate accident back in 1988?
I sort of get what they are trying to do, and it’s nice to think that people care out of respect for things that had happened, but it does seems a bit simplistic to not allow the entire possible range of callsigns that might end in 113.