Trouble syncing Onedrive & Google drive files with desktop

Lately, either they don't sync from desktop to phone or vice-versa, or it is delayed for a considerable length of time.

I have several word files I regularly update on the desktop. I launch Onedrive & Google drive, the systray icons show they synced, but hours later when I go to my phone, either one or both have not updated.

I just shared two screenshots a little while ago from my android Photos app to Onedrive. I could then see them in Onedrive, I then launched Onedrive on my desktop, the systray icon said everything was synched, but they were not.

I went back to the phone, went to "one" of the screenshot files, and selected "Make available offline". Finally they both emerged on in my desktop Onedrive folder.

I never had to do that in the past, and I also don't understand how making only one of them available offline allowed them both to sync.

I have bunch of youtube links I shared on my phone with with onedrive, The showed up as text files, and never synced to my desktop. I just now had to select them all, and "download" them to my desktop.

 

Rebooting, yes. I have several methods of linking desktop to phone, notifications on the desktop, reading text messages on the desktop, etc., and I rarely have issues.

How do we explain the "Make available offline" thing?