All clients are showing up in the Deco app list but one has just recently started showing up without its signal strength displayed. A firmware check indicates that I'm up to date. I rebooted all three Deco devices.  The one client is now showing its signal strength but several others are not.  All clients are wifi connected and working fine.

Any suggestions on what to do next?

Update:

After performing a Network Optimization, the 2.4Ghz band Channel was changed. Now all signal strengths are displaying except one.  This one client is different than the original indicated above. It is wifi connected and still working fine.  So...I'm still not understanding what's happening.  Any thoughts would be greatly appreciated.

Update #2:

Playing around with more settings...I turned off Rapid Roaming to see if it would affect the device indicated in the last update. No change.  I turned it back on and it now displays its signal strength.  All clients are displaying their respective strengths. I have no idea why :)