I just replaced a half circle of gargraves track with new Atlas nickel silver track (O-72). The rest of my layout is Gargraves. My layout has been working just fine for years. When I run a Legacy engine slowly over the new circle of Atlas track the marker lights flicker and sometimes the engine just stops. Also happens with a TMCC engine. I used the Atlas joiners (flimsy) to mate the track so I thought maybe I did not have a solid power connection so I used some jumpers between the two types of track but it did not help. This half circle of track is right next to my control panel so I don't think I have a TMCC signal issue unless Atlas track has issues with TMCC. I could use some ideas to try.