Hello Piotr,

Unfortunately, that's just a limitation of the standard RFB/VNC protocol which limits the length of the password by 8 characters. Everything after the 8 characters is not actually used in the password. Thus, "password", "password0", "passwordX" etc. all will work equally on the protocol level. If we enable longer passwords, we would break compatibility with VNC. Sorry for the inconvenience.

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Best Regards,
Constantin