strange problem on migrating to .net 4.8

hello together

since a week I have a problem with mapped object in my AUT. They appeared when we changed the .net version from 4.6 to 4.8. 
the simplest login form (last change in 2017) with data base, username and password. 

before the change, testcomplete displayed the following 

let usernameInput = Aliases.OpenTAS.dlg1201X6Login.ControlsContainer.xtraScrollableControl.dfsUsername.TextBoxMaskBox;

After the change is comming following:

let usernameInputNew = Aliases.OpenTAS.form.paneControlscontainer.Panel("irgendeintext").Window("WindowsForms10.EDIT.app.0.3ce0bb8_r7_ad1", "", 1)

irgendeintext was taken from the edit field, so the test couldn't be executed from one other PC where text is different. 

has someone any ideas how to manage the situation?

thank you all 

P.S.: on the virtual machine is an older version of .net 4.8 installed (4.8.04084 vs 4.8.03761) and the mapping is ok
but the VM could not be used to write tests 🙂