I have 2 similar display Dell S2718D connected through rear USB Type-C but after wake up one of them some times (approx. 1 of 7 wake up cycles) can't determine correct resolution (screen 1, 2 and 3). It is return to normal resolution after unplug and plug monitor back or power monitor off and then on (screen 4).
For test purpose I connect one of the monitor to HDMI port and 5 days there is no issue appeared and them both works as it's should.
That sad, but my issue happens again just now after 9 wake up cycle.
Also tells some additional details of my observation.
There is no link between monitor sleep time and issue occurrence. It can happens with very short sleep time less then 1 minute and also with a long sleep time if I don't power off my NUC for night.
Update display driver was the first I've done before ask about my issue here but this does not help.
Today I'm remove driver then reinstall it, but issue was happened again after second wakeup.
For now I can't find any other USB-C monitor for test purposes. And buy another one not in my plans for now.
I will change monitor cable to new one. I response on result after issue appears or not.