Slow Library Update for Cloud Sources

I notice that Infuse seems really slow to update files which are on Put.io or Bitport. Even running Library update manually doesn’t bring up all the files right away – some mob=vie titles appear, while others may take a while to pop up in the list.

The titles appear right away in both the Bitport app and Put.io app, as well as in Squire. But not in Infuse.

How often does Infuse poll cloud shares and does anyone else experience this?