I noticed that after setting UTM as my default gateway I could no longer install or update games on my xbox. After a couple hours I discovered this was caused by the antivius scanning option.
My solution was a static dhcp entry for the xbox assigned to a new web filter profile with AV scanning disabled. Ran into a similar problem with a Samsung Blu-Ray player where Netflix would crash at 6% or 25% when buffering a new stream. This is also working with a static assignment to the new filter profile.
Just wanted to add it to the board in case someone else comes looking.
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