Problems since update v11.6 with XY chart (BUG?)

Hello,

Since I upgraded to 11.6, I’ve had a lot of problems.

I’ve had to repair 2 XY charts.

And on repeating them, I realize that the “Show threshold” option has disappeared in this type of panel.

Normally, in a panel like this one with a bar chart, you’d find this menu :

But in an XY chart type panel, it’s impossible to see it and therefore to display the thresholds:

I hope this will be corrected

On this type of panel, I also have a problem with transformation by regression analysis.

Before the update, the regression line had a different shape.

Before, it crossed the graph horizontally. Now it crosses it diagonally. Weird

As I don’t have a screenshot from before, I used OpenOffice Calc to recreate the graphic and here’s what the line should do (and what it did before).

Here’s my data if you’d like to give it a try yourself.

recurrences valeurs
2 2
9 3
33 4
43 5
44 6
24 7
3 8
1 9

Polynomial lines also trace differently than before

UP.

I need an answer as to whether this is a bug or a usability issue on my part.

Another behavior appeared that I hadn’t noticed before. With Override by name, you could change the name with “Standard options > Display name” of the series without any problem. Now, changing the name causes the series to disappear from the XY graph.

Thank you for your help.