The situation has improved, but I still noticed some problems: 1- If when creating an auto keyframes range, we have the "create curve type" already set to bump (because it remembers it from the previous time) and then we go directly to the "create keyframes" phase, the autos that are formed are not bump type. In this case we have to transform them manually via RMB and choose "bump". However, I noticed that this setting is not automatically transmitted to the corresponding autos in the other tracks. In short, "gang mode" does not work. This is very boring if we have a lot of tracks because we have to intervene manually on every single keyframe of the interval in the timeline. In any case, when we want to create a bump autos interval, just remember to click on "create curve type --> bump" even if it is already preset. This way, in my tests, it always works well. 2- If we create a bump autos interval and vary their value with the slider, everything works fine. However, if we change these values a second time (always with the slider), the problem returns that the created interval does not change according to the edits. Sometimes it works, sometimes it doesn't.