possible to make an action pause for 1 second?

I'm still having problems with fast export to jpg. Function became much more reliable once I disabled all the creative cloud sync features I could find, but am still experiencing intermittent unreliability.

I think that sometimes the image looks one way to me on the screen but is not actually that way to the system yet, and then I fast export it before everything is all synced up and I get the wrong version of the image.

So I want to insert a short pause into the action I use to do the export - I want to hit the function key, have the system wait for a second so the image is completely processed, then continue with the action, then pause again before returning to me so it's completely saved.

Is there a way to insert this type of pause into an action? I need the program to continue running in the background, or there's no point, so I think that the "sleep" scripting function won't work.

cheers,

dave

ps - I don't need any alternative workflow suggestions - just an answer to this question.