Hi Peter, 
iPhone 16 Pro max 26.0.1 ST4 1884
On opening the software I found my song that was already selected the first segment was already slightly highlighted meaning it was not cued up to beginning of song , when I hit play it did not play until I hit start again then in a jerking fashion it started playback.
Switching SONG and PLAYLIST  buttons between the different views switches smoothly one way than you need to hit the buttons a number of times to get back in to the previous view, if you switch one way then count to five then you might get a reliable switch but you can’t go back and forth smoothly as is.
The ZOOM PINCH GESTURE DOES NOT WORK ANYMORE ON  BOTH IPAD AND IPHONE.
On IPhone if you lie the phone flat on the table the ZOOM buttons on the side disappear and come back if you grab the phone and hold it upwards.
The ASIGNABLE BUTTONS have disappeared even though they are programmed to show.
In landscape mode they show up as you hit play and remain in view and in portrait mode they disappear if you hit play  and don’t come back again . There is a definite pattern there.
That’s it for now .