Hi, since S1 was updated to 5.5, Pro EQ2 has a graphical glitch that wasn't happened before. Once you create an EQ curve, the curve should be stayed there, but it is not. The cause is random, so I have no idea what causes the issue. This issue is still around with the latest version, 5.5.2.
Here is the screenshot for the reference:
Hope it will be fixed in the next update.
Thank you!