Whiteboards rely more heavily on real-time syncing, so issues with proxies, firewalls, or VPNs can cause this. Certain ad blockers, privacy extensions, or corporate security tools may specifically block the real-time connection for Whiteboards.
I recommend you try hard refresh, clear the cache, or try another browser (or Private mode).
If you have restricted permissions on the space or page, it might also block real-time access, so it is worth checking this, too.
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