Focus 2011 1.6 petrol titanium.

Can anyone tell me if these warning/faults are related?
I had a dash warning for a low mixture which was just taken off after MOT in Jan, it came back abput a month later but all was running fine, my garage said not to worry, they would look at it the next time i was in.
Last month (May ish) i started to notice loss of power when trying to drive from cold start up, but if i let the engine warm up first i dobt have an issue?

ill be booking it in soon, but just wanted a bit of knowledge to go in with.

Would these be related? Or is either a common issue
thanks