Also happens in Draw.
You cannot change the width and height of the connectors when they are connected to gluepoints in two shapes. The sidebar allows you to enter numerical values for these settings, but when you deselect the shape they revert back to normal (and the connector does NOT change size while you are using the increment/decrement arrows in the input box). Changing the width and height of the connector should either change the position of one or both shapes in order to accomodate for the new settings the user set for the connector.
If this is not possible, then I reccomend that these input boxes get disabled (i.e. grayed out as an affordance for the user) when the connector is selected.
Steps to Reproduce:
1. Insert two shapes
2. Insert a connector that starts at a gluepoint in one shape and ends at a gluepoint in the other shape
3. Select the connector and go to the "position and size" (called "line" in Draw) section at the sidebar
4. Change the width or the height
5. De-select the connector
The width and height get reverted back to their original values, preventing the user from changing it
Change the height and width of the connector by moving one or both of the shapes to which it is connected
User Profile Reset: No
OpenGL enabled: Yes
Versão: 220.127.116.11 (x64)
ID de compilação: 3d775be2011f3886db32dfd395a6a6d1ca2630ff
Threads da CPU: 8; SO: Windows 10.0 Build 18362; Realizador da interface: GL; VCL: win;
Local: pt-BR (pt_BR); Idioma de IU: pt-BR
The same also happens with position and rotation and the buttons to flip horizontally/vertically do not work. Only the bring forward/back/to top/to bottom buttons work. Perhaps these all should be grayed out as well or straight-up removed from the sidebar.
The position and size refers to the bounding box of the connector object, and indeed, setting them when the object is connected on both ends makes no sense, because the connector lacks any freedom. The settings should be disabled then (both on the sidebar, and in the Position and Size dialog).
If a connector is only connected on one side, the settings should still be enabled.
The topic was brought up in bug 55608 comment 5. I agree it's not particularly important, so adjusting priority and severity accordingly.