@justmakeitwork I have a Tacx NEO as well. The issue you raise is true for 100% of rides where there is a substantial burst and the burst is short. I learned this when I was in SSB MV1 and decided to do Disaster-1 that included 10x 10sec 200% bursts and then later in full Disaster (that included the same sequence) as part of the TR user community workout day, and it’s been true in every workout with similar bursts ever since.
The TrainerRoad software seems to attempt to correct for this by starting the ramp a few seconds before the actual burst. And as one user complained, the software lets off the gas a few seconds before it supposed to further limiting the user benefit of the burst.
This issue was particularly “annoying” when I decided that the Ramp Test wasn’t a good FTP test for me and did my first 20min FTP test using the TR workout. As I know that you need a real ramp to get up to “FTP speed”, I imported the TR 20min FTP test into Workout Creator and added a 15sec ramp. This was before I understood TR’s software issue. What a mess of the workout it created! [I’ll skip the details].
So the workaround I discovered that works great was to create/re-create the workout in its entirety in Workout Creator (fabulous tool, not difficult to use). In the case of the 20min FTP test, I decided to implement Dr. Andrew Coggan’s FTP test exactly as prescribed (differs from what Coach Chad put together), including the ramp I described above and the in-test ramps prescribed by Dr. Coggan. It worked perfectly! The same approach works for shorter bursts as well. If quality bursts are important, you can recreate the burst in WC with a ramp (e.g. 10sec ramp of 40% to 150%) and then 12sec at 150% if that is the workout.
Tomorrow I am leading a ride within the S.F. Bay Area hosted by one of the TR developers, @daniel and plan to talk to him about this issue. I don’t know whether it is unique to Tacx NEO, but I seriously doubt it because one of the key features of the NEO design is that it uses electro magnets operating at 1000Hz - it is how they can uniquely simulate riding over any type of surface (bricks, wood, gravel, etc) in Zwift (Shane Miller has a video on this). I will let you know if I find out anything worth reporting.