I have looked at the profiles of the sovol application with the text editor and I have found that in some of them a fixed temperature value came by default, as in the case of the SV06Plus. I have modified the text string ““material_initial_print_temperature”: { “value”: “material_print_temperature” },” in all the profiles that were wrong and I think it is corrected now.
Delete the sovol profiles in the Program Files/Ultimaker Cura 4.5/resources/definitions folder and re-download the profiles from the GoogleDrive link above.
It is because I have changed the name so that they all have the same format and if you do not delete the previous ones, duplicates will appear.
You could also try a mod version of prusaslicer to which I have added the sovol printers.