Underground Delays

Since going to High Sierra, I only noticed one issue

My weather underground site is set to update every 5 minutes.

It does BUT it waits another 5 mins to post it

So the 11:30am entry didn’t post until 11:40am

I made NO changes to WD or any settings. Worked perfectly before the OS update.

Nothing serious of course, just wondering if anyone else experienced this and/or how to get it back to proper 5 min intervals