About AA2019 wait for screen command

Hi team

when i used AA11 version, the wait for screen changed command is useful for any windows, but in AA2019, it is never succesfull on windows

for example, i typed some search condition on an SAP window named windows-xxxx

then i type F8 to execute query, and then the search data window appeared, it also called window-xxxx, so i use wait for screen command on window-xxxx to monitor some area changed. but how ever i drag any area on window-xxxx, the time-limit error for wait screen

appeared!

what should i do to make it useful? help me pls!