Background litho poking through

AhmadMumin

20m intrusion (red) logged down hole crosscutting bigger intrusion (pink).  For some reason, the green background unit is poking through - can't figure this one out.

Resolution on the red unit is 2m, 3m on the pink unit. Snapping is set to Drilling Only and Snap distance set to 100%.

No other holes influencing the green and red units in the vicinity.

Any thoughts?