Fuel trim issue?

runner1

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19 gt2 with JB4 and bms intake with borla catback. Did a couple map one runs on 91 octane after reviewing the logs I noticed the trims much lower than they were traditionally be well under 40 for the most part where before they were well over 40. The temps were high, and the fuel probably questionable but what would cause the lower trims? Car did feel a little flat but the log doesn’t look terrible to me I would appreciate someone looking it over and give me some advice
 

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It almost looks like they’re crashing towards the end of the run heading to under 25, I don’t understand this and I don’t have any input just questions LOL
 

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Lower fuel trims aren't a bad thing. If they were pegged at 50 you'd have to dial the boost back or really watch logs. You can throw some E in it to get the trims up
 
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