Have you tried refreshing the page after setting the slider? It sometimes seems to l9ad outdated info from a cache and refreshing the page can help in those cases.
HI, yes, after changing the slider, I wait until all numbers are re-calculated, then I refresh the page, since that is the only way I found to see if the stars change color from the change of FF.
Some days I feel fresher, some days less fresh. Would be nice to be able to adjust FF to refelct how I feel this particular day and then just have the right type of workout served by the AI
This section (picture) change depending on the colors of the stars, when changing the FF slider, so that part works as I think it should work
Aha, I notice it has changed. Now the recommended workouts change after I change color of the stars between blue ↔ yellow when using the FF slider.
Move slider, wait for numbers to recalc, refresh page, new workouts proposed 
Now it works as “assumed” Thanks!
What is the shortest intervals XERT uses to calculate TP in seconds?
I get the feeling that it is a very short window. That would explain why XERT overestimates my TP by approx 25w. For a light guy like me, that’s about 0.41 wkg
I had the same issue with intervals.icu with their default value they have. Since I am more anaerobic than aerobic phenotype it also gave me unrealistically high FTP in the beginning, only because my short burst power numbers are relatively high, vs my FTP/TP. Now I set that timer in intervals to 410 seconds and it is much more aligned with what I can actually do over longer durations. Is it possible somehow to tell XERT to use a larger min-window to calculate my signature profile?
If you do some very short all out efforts to breakthrough, it should increase your PP and HIE and reduce TP automatically… is your PP correct? Interesting to know your overall signature, and you can check that vs some rough norms
Are there errors in my Fitness Signature? – Xert (may have been posted before but still could be useful
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How short are “very short” efforts?
Almost every sessions I do with MB, at some point Garmin-MB tells me I make a new 30 sek BT but it is never reflected in the training log for that session on Xert training Activities, but I think I read something about that already so that is not an issue.
I think above TP, PP, 3min Power are too high, approx 20-30 watts.
HIE is maybe too low but I am not sure about that.
Both Xert HIE and Intervals W’ fluctuate wildly based on the inensity of the activities recently have done last few weeks. In Intervals it swings changes between 30KJ and 16KJ. I would assume that HIE/W’ would be more stable value in it’s nature.
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Occationally Xert thinks my TP is 286w while Zwift and Intervals place my CP at 263. This leads to Workouts having too high z2-z3 so I quickly die and cannot perform most of the high power intervals in the pursuiter workouts.
Going through my activities and check if I have any oddities in there or have faulty outliers, I am not skilled enough to identify those things. For now I turn down the power a bit between intervals so I can manage to complete the XSS for High+Peak and pay less attention to Low XSS. Maybe that totally destroys the purpose of the workout?
Are you sure it’s saying you have a new BT and not saying something like “BT if you hold this power for another X seconds”? That was confusing me for a little bit until I squinted enough to read it properly mid effort
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Garmin says “new 30 sec BT detected” once in a while when I do my PP intervals pushes
For PP I’d probably sprint all out for 10 seconds…
Not sure for HIE, maybe out to 2 min…?
They do need to be all-out and when fresh, not just what you happen to hit in a normal training ride (as you mention getting a BT on most MB rides). Also, MB rides typically draw down MPA over quite a long time over multiple intervals, so while you are hitting all ‘systems’ including HIE / high strain, you will also be hitting TP / low strain in any BT you get in those. A single short effort to BT may yield a different result.
If that doesn’t clear it up you can write an email to support for more personalized advice, including helping hunt down data errors
Sounds like you are actually seeing the magic buckets message that you will hit a breakthrough IF you hold your current power for another 30 seconds.
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OK: I will pay more attention to that message, you are probably right
As others have mentioned the XMB message refers to a potential BT. 
If you continue to ride for 30 more seconds at current strain a BT is likely.
Go harder and you can shorten that estimate but you’ll be cranking up the pain.
If a BT is detected a BT badge will appear below HR.
Another way to look at it is signature validation. Just getting close confirm your signature is dialed in and that portion of the workout was very hard.
Xert doesn’t rely on MMP sampling to determine your fitness signature and power curve.
Your signature is derived by analyzing sec-by-sec performance under fatigue.
I don’t think you should try to match terms and numbers between platforms. The methodologies and math differs. They are not meant to match although they may be close for some.
Have you tried switching to Slope mode when the going gets too tough? It impossible to “fail” a workout that way especially if you monitor XMB on a Garmin while you execute the workout on EBC. You don’t have to match the intervals exactly to fill the buckets for the day. Same as it would work riding XMB outdoors.