I can’t confirm the crashing, but all users are using Panorama X in different ways.
I am using Panorama X often in the data sheets with occasional use of forms, other users are relying on more or less complicated forms. I am mostly importing data as CSV files and then do some grouping, sorting and calculating with the data, others use their databases for more manual data editing.
Regarding the right or left arrow or the click in a different field in the same record I can say that this issue is a graphical glitch only. Panorama X reacts to the arrow keys or to your click in another column correctly, but the display is not refreshing and not indicating the change of the active cell.
You can check this by starting to edit the cell content: Now the display refreshes and you see immediately that the correct cell is activated. You can watch Pan X switching to the other cell in the Properties panel, too.
So in my eyes there is not much use for macro fixes. Until that graphic issue is fixed, the only annoyance is that you have to press the arrow keys twice or to click two cells (in a different record and then back) to see the active cell marked correctly.