Placeholder %cmi_bungee_current_[ServerName]% show vanished staff

can it be fixed?

1.16.5 paper
dynmap? v3.1 GA

I have a placeholder %cmi_bungee_current_[ServerName]% in hologram in lobby. For example, there are 3 players on that server [ServerName] + 1 staff who has vanish, but the placeholder shows 4 online players. I need the staff in the vanish not to count

This doesn't sound like a Dynmap issue at all, it sounds like a PlaceholderAPI or Hologram or Vanish plugin issue. I'm going to close this as it seems very unrelated but if you believe it is still related to Dynmap please comment and I will reopen

Can you give us a bit more information?
Here is a template you can fill out to help:
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1.16.5 paper
dynmap? v3.1 GA

I have a placeholder %cmi_bungee_current_[ServerName]% in hologram in lobby. For example, there are 3 players on that server [ServerName] + 1 staff who has vanish, but the placeholder shows 4 online players. I need the staff in the vanish not to count