During hold mode, managed speed goes into red band. Only way to prevent this, is to go into selected speed onto the FCU.

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During the hold, the FCU also bugged out.

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Du

At the initial phase of the hold, the aircraft turned left for a while, before turning right towards the hold. 

[Deleted Account]

Can you please tell me over which fix you were holding?

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2 minutes ago, gumbyger said:

Can you please tell me over which fix you were holding?

Sure - I was holding over DOGAL. Unfortunately I haven't saved the image from the FMC of the hold page. 

[Deleted Account]

Im unfortunately unable to reproduce this.

Can you maybe give me extra steps on how you did this?