I wouldn’t be surprised if the aiFTP and PL progression are designed to work together better when PL are in a middle range let’ say 4 to 7
but many TR users (including me) update FTP too often and the PL remain low so PL 1 to 4 .
AI FTP isn’t a magic bullet for me either but I accept that its calculations are heavily biased for me by my outdoors road bike / group rides. I’ve let it do it work just now as I’m doing most of my work outdoors and the last time I did indoors I did it on resistance mode but I think if AIFTP continues to suggest higher and higher values I’ll overide it and select one I feel is suitable for a TT position. Sometimes you just have to accept the limitations of the system and take control 
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