I've not noticed any signal delays on pre-TSW6 routes, even though it's supposed to be backwards compatible.
Did I miss something? Have TSR's been added retroactively to existing routes now? The reason why I'm asking is, becuase I seem to have stumbled across an invisible TSR yesterday: I did a service on Ludwigsbahn, took an IC from Kaiserslautern to Mannheim, cab forward (don't remember the exact train number and can't look it up since I'm at work now, but the time was around 14:00). Since it's a rather simple service and I know the route quite well by now, I drove without HUD. Right after leaving Neustadt-Böbig, just when I was preparing to go up to 160 km/h, I got a PZB emergency brake out of nowhere. There was no sign, no PZB magnet anywhere as far as I could tell. Switched the HUD on and saw there was a speed restriction down to 70 km/h up ahead. I thought I might have missed the sign. But when I got the train running again, I passed the TSR slowly, and there were no "A" or "E" signs either. Shortly after passing this spot, the line speed rose up to 160 km/h again. To make sure, I went into photo mode and searched the line for an orange "7" sign, but found none. While I would welcome the addition of TSR's to older routes, I'd prefer to actually see them too
Just to add to this, I have encountered an invisible TSR on Stuttgart Heilbronn as well. This was the „the last nail in the coffin“ for me and I have now disabled all random events. They seem to be too unreliable, unfortunately… I want to add, though, I wanted to make sure this is not mod related, which I still need to do. Would be good if others could report this behaviour as well, if encountered, and maybe add if mods were installed or not (not sure mods could do this, just want to rule it out).
Stuttgart-Heilbronn was the first route where I encountered TSR's at all, prior to its release I never had a single TSR (I don't own any other TSW6 routes). There, they worked fine for me so far I don't have many mods installed, but I'll try the same service with the same conditions again this evening without any mods, to double-check.
I can confirm the same on Ludwigsbahn. Suddenly a PZB zwangsbremsung, then speed reduction. And then you pass the invisible magnet on the other side and you get another zwangsbremsung. Kind of very annoying
I haven't had much time to do a lot of TSW these days, but I did some experimentations. So far, the only pre-TSW6 route I encountered TSR's on is Ludwigsbahn. I had two more TSR's there, both were visible and working as intended.