First time sync initialization makes Obsidian unresponsive

When I first start Obsidian on Windows, the sync stays in “Initializing…” for a good few minutes, where the UI, shortcuts and nothing seems to work. There are 20K notes in the vault, and I do think it gets proportionally worse with more notes. After Sync is done Obsidian is responsive again.

Can it be fixed that this sync thread / activity is done on a way that it does not freeze the use of Obsidian? It loads blazingly fast, but sync makes it unusable for a good while.

The log goes as follows:

2021-09-13 06:26 - Connecting to server
2021-09-13 06:26 - Server pushed .....
2021-09-13 06:29 - Uploading file ....
2021-09-13 06:29 - Server pushed ....
2021-09-13 06:29 - Upload complete ....
2021-09-13 06:29 - Fully synced

Time between "initializing 06:26 and fully synced 06:29 Obsidian did not work, like opening notes, creating a note, no views changed, everything just “froze”