I seem to be getting the problem here as well. Whenever I correct a slide my G25 just goes off centre and point blank refuses to go back to centre without me plugging back in.
I only get the problem in LFS as I have tested it on other sims so why it's only happening here I don't know. Tried the steer speed reduction and that didn't help :\
If anyone could help that would be great. Never had a problem on my DFP so only the G25 is doing it :s
Note: The wheel is basically brand new only about 2-3 months old and I don't really put it through rigorous effort so I can't imagine its a hardware fault.