Zoom Freezes on Laptop when using 2nd monitor when doing powerpoint screen share

[psnc]

We have always used a laptop connected to a tv with HDMI cable to host some Zoom meetings.  Just last week I noticed that Zoom was freezing and generally sluggish when sharing a powerpoint - nothing special 12 slides.  We tried this with multiple laptops.  What we discovered is that when we do this without using the 2nd monitor, it works fine.    Now, we are forced to use 2 laptops.  One for the zoom host and the other as a participant that can share the screen.  Is this a bug ?     We used to do this all the time