That typically indicates your signature isn’t quite dialed in yet. It may settle in on its own once more maximal effort data is accumulated or you can make a manual adjustment as suggested in this post – Let's See Your BREAKTHROUGHS! 💥 - #27 by ManofSteele
Another way to validate your signature is search the library for “breakthrough” when your form is fresh. Pick one and ride it in Slope mode. Try to exceed targets plus include a sprint effort (5-7 sec minimum) when you are about to collapse on the hardest interval.
Reference –
Rating – Xert (baronbiosys.com)
Breaking Through the Xert Way! – Xert (baronbiosys.com)