Latency to update blocks noticeable

[Hazurl]

Describe the bug
(Not really a bug)
When a block is updated on a client (removed or added), the other client can noticeably see the latency. The latency I can observe is about a 10th of a second.

To Reproduce
Steps to reproduce the behavior:
Open 2 clients side by side, update a block on one client, observe the latency before the other client see the update.

Expected behavior
For a single, through localhost, I would expect almost no latency.

Screenshots
(Too lazy do to a video)

Desktop (please complete the following information):

• OS: Windows 10