Advance Keynote slides in ZOOM with Mac
I'm using Keynote 10.0 on ZOOM 5.0.4. This must be really simple but I can not figure it out. When I share the screen and the individual slides appear, I advance each slide using the right/left arrow keys. Everything works fine, unless I have to hit the mute button on ZOOM. Once I hit the Mute, the arrow keys no longer work. They will also not work if I change back to Unmute. I must click on the lower left corner of the screen to advance to the next slide, but there is no way to go back a slide. Also, after unmuting, occasionally, the slides begin to advance on their own, which means I have to click through to the end and start again until I get to the appropriate slide. I have not found any info on the ZOOM help page that addresses this. Thanks in advance for any help you can give.
iMac 21.5″, macOS 10.15