Jumper t-lite: after update I can't copy or move rows in mixer

[bernd25]

Before submitting, search the open issue if there is already a report of the bug

After having update to 2.3.15 I can't move or copy rows, anymore E.g. in mixer, inputs.
For example:
I want to copy first row in ch2 of the mixer to ch3. I select the row, go in to menu and choose "move".
I press "ENT" and it appears the channel-monitor. Now I press RTN, I'm back in the menu of the mixer, but then nothing happens. it seems as if the information to move was lost. Same thing when copying a row.
Downgrading to v 2.3.14 all similar operations work well.

[bernd25]

fix confirmed working in Jumper T-lite private build