very very strange error.... GIO switches to BLIND when I control a certain channel

My channel 9180 have 5 parts.
If i select this channel use the Encoder or the intens.-wheel at exact 37% the GIO switch in BLIND.
Only select this channel,and the use the Encoder.
Nothing more.
I have look at TAB99 the Log but there i see nothing.
Channel 9180 not start a Macro or some like this.
I not know how a Encoder can start a macro.

My first idea was, i have anywhere a ShowControl sACN in and there at 37% for this specific adress is a switch to blind macro.
But i have empty my Tab 11 and have do a deep clean.

This error is in this way reprocible.
But it not ever happen if i rotate the encoder/wheel
it is ever at 37% and the Desk ever switch to Blind.
And it happen only with this channel.

Any ideas?

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