A problem with Voiceover activities on the Mac

macOS and Mac Apps

Hi there,
I returned to a Mac as my main device after a long time without using a Mac, could someone help me with this question, please?
When switching to any activity I've created (let's say, an activity called "reading"), overtime I open another application or use the finder to find something, voiceover automatically changes again the active activity to default value. Is it a bug?Is there any solution to use a created configuration still I decide to change it by my own?

Thanks in advance for any help