Squeezepad issues ?

Last week, all was fine. I do not know why, but suddenly track selection and playing has become rather strange;

1) I can only select a track by holding my finger on the icon and waiting for the Play Now, Add to End etc. Options to appear.
2) The track then plays normally but simply stops at the end. The next track in the album or playlist is not played (I have play all songs in list selected in the settings of Logitech Media Server v9.2).
3) Although, whilst playing a track, I can move the progress slider along, the time changes but all audio is lost.
4) Selecting the Play Next Track icon just starts the same track from the start.
5) I cannot select a track just by tapping on it - I have to hold my finger down as in (1) above.
6) Not sure if these issues are generated by Squeezepad or LMS but things changed without me knowingly making any alterations.

LMS v7.9.2 (running on Mac)
Played over wifi (UPNP) direct to digital amp.
IOS v13.2 on IPad
Same symptoms whether I am playing tracks from my own media library (held on the Mac) or via streaming service Qobuz.

Have tried all the settings I can think of in Squeezepad (e.g. Add to End, Play Next etc.) and in LMS ( Defeat destructive play, Play all songs in Directory) etc.

Any ideas ?