No matter how you access Zoom even if you are a regular Zoom user finding out if you are on the latest version is not obvious. Open the desktop app, click the profile photo, select “Check for Updates”.
When did you last update Zoom? If your answer is I checked it last week, even yesterday and Zoom is not behaving as it should I suggest checking it is up to date. Often point updates happen automatically 5.1.1 to 5.1.2 for instance but not 5.1.2 to 6.0, these integer updates will need the user to action the update.
Are you up to date?