[Matt93SE]

sounds like the circuit you're trying to check resistance also has a capacitor on it somewhere...
capacitors store energy and will cause funky readings like that.

what exactly are you trying to test?

(and yes, I'm an electrical engineer myself, so I've seen it before. )

 

[Matt93SE]

ahh, yes.. they have a capacitor inside them, so they're not going to read a constant resistance.
it should be around 0.7 ohms, but with a resistance that small, there's bound to be a bit of wandering in it, as well as the capacitors in there causing the resistance to slowly creep up/down anyway.