Password auto fills with dots after sleep
Hi - I notice this thread with posts spanning many years with little recent updates so thought would post again. My iMac, after sleep mode, autofills the password which is not my password. A series of dots appear in the field. The only way to successfully log on is to hard shut down the mac and restart - obviously not a viable solution. I have changed wireless keyboards to see if it would make any different, fully update OS etc, perform complete reset of the machine... I'm now out of ideas.
Is this a sign of a more serious fault?
I have Sophos installed on machine and there is no sign of any concern.
FYI - I'm running macOS Mojave 10.14.5
Any help is gratefully received.
iMac 21.5", macOS 10.14