zoom meetings open as thumbnails on the task bar

opened zoom for a meeting on Friday but the meeting would only appear as a miniwindow in the zoom spot on the task bar.  I had to keep my finger on it to keep it open.  I could hear the meeting and everyone could see me as usual.  Usually clicking such a window opens it up but no.   I downloaded zoom workplace several times to no avail and even closed down the whole computer and started over.  No.  I tested it out several times later that day with friends setting up meetings.  Still the same.  Any ideas anyone?  I have another meeting on Monday evening and am quite worried.  Thanks