iCloud sync too slow

I like the new functionality (to annotate and insert pictures on the Mac). But I found the iCloud sync is way too slow (compare with iOS). Not sure why, It’s faster to upload changes on the iPad app, but much slow to do so on the Mac. This becomes a problem because I like to took screenshot and insert the image on the Mac, and then use the iPad to annotate with pencil. But the it took a few mins for the sync to complete. I will rate it 5 stars if this issue is solved

Chuanhao90 about GoodNotes