Xert and intervals.icu estimated FTP way higher than ramp test. Is that normal?

Yea, I haven’t done any long sustained efforts for a while. I mostly race CX and now some crits. I was doing longer and longer SS intervals back in Nov-Jan, and got up to 1x55min @90%. But since then, I’ve been shortening the duration and going for higher power as the crit season is starting up. More anaerobic and VO2 stuff. Longest SS or threshold interval in the last month or so I’ve done is maybe 15 min.