Continuous focus stops when I use the touch screen to select a focus point.

[Gibby]

I'm shooting video with X-T4 on a gimbal, in continuous mode with face detect on.  If I try to change the focus point using the rear touch screen (pressing top right corner of screen until it gets to "AF", and then click on the desired focus point on the screen...it will refocus on that area, but only once.  As if it was switched to single focus mode.  The manual however, seems to indicate that the camera should remain in continuous focus mode and track that subject, which it doesn't.   I would like be able to click on a point using the rear screen and have the camera track in continuous focus.  Is this even possible?  Not clear in the manual.  tks.

Edited October 28, 2021 by Gibby