Clinic Guard Sneaking

Hey, so I picked up VTMB recently on steam hand have the basic patch installed. Been enjoying it so far up until I have tried sneaking past the guard in the clinic.

The guard just seems to be able to detect me from around corners. or even when we are moving down parallel corridors and comes running at max 5 to warn me to get out even clipping through walls to do so.

Is this common? is this just the nature of an old game, that sneaking is next to impossible? I have tried with 1, 2 and 3 points in sneak. But would have thought that even with just 1 point learning the pattern and timing it should be possible.

Is this the patch?

Anyone else experienced issues like this?