Chain slipping after installing new chain.

mark8191
mark8191 Posts: 72
edited July 2020 in Workshop
Changed my worn out 11 speed chain for a new KCM one today.
I've noticed when I back pedal on the biggest cog and small chainring it slips up two gears. It doesn't do this in any other gear or chainring and don't think I've noticed it before so wondering if I've done something wrong or this is normal?

I lined the two chains up before installing and attached two narrow links with a quick link.

Advice much appreciated. :)

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