Getting back to my WSUS issue with feature updates.
Just now i had one PC updated to 1803 after approving KB3012973 (1803 update for consumer versions en-us, released in July, newer 1803 update version, but it was the same with the May one). After installing it winver showed 17134.112. It has found a few more updates on WSUS after that (Flash player and some other regular update) and installed. Check for updates didn't return anything else. But WSUS was showing it still needs KB4338819 (July CU update). I have wiped SoftDist and did Check for updates again. Then it has pulled it, installed. Version changed to 17134.165. And then WSUS showed it doesn't require any updates.
Btw, another annoyance is that i have to press Check for updates dozens of times and also run wuauclt /reportnow or /detectnow a few times for machine to actually update its status on WSUS. I would like for it to update its status right away after clicking on Check for updates..