Hi i want to ask, can i trust a breakthrough from a single sprint like this
Looks like something you should flag especially since it was a Gold BT and the after-effect chart shows a ZRL event ridden primarly at LTP level strain. 
When you select the Previous button doesn’t that chart reflect what the race actually felt like?
Since there was a period above TP before the BT, the algorithm attributed the increase in fitness to PP, HIE and to TP as well. There is little fatigue information for the algo to go on to actually infer the currect signature from this data. Hence it provides an answer and in the vast majority of cases, it doesn’t do too bad but here you could argue that the BT should be flagged.
Alternatively, you can tinker with your signature to see if you can set the values to better explain how you were able to produce the power on this ride. If you can find a suitable signature, save it and see if it is something that you can live with and possibly reproduce. If not, you should definitely flag the BT and leave it flagged. If you are unsure what 
means or how to do it, best to just leave it flagged for now and learn a bit more about fitness signatures.