500mm Bed Mesh & Z-Offset

I’ve ran a few meshes prior to a one hour heat soak and when I’d home and 0 the toolhead the paper test would give me the correct amount of friction. I just ran my last bed mesh calibrate around an hour of the bed sitting at 100c, however now when I 0 out the toolhead there’s 0 friction. Is it okay to run like this or should I do the paper test now and manually change my Z-Offset? The upcoming print will be about 30 hours. Thanks! Initial 0.5XXmm deviation was from a cold run and the latest is from it heat soaking for about an hour or so.