A999 First gear engagement

Check fluid level idling in neutral. Always been this way? Hot or cold? Low 1 and D? Worn forward clutch..excessive clearance.
No it wasn't always like that it start doing that like after 10 passes. Yes in low 1. It is a fully build manual transmission.
Sometimes it engages right away sometimes not.
And yes we have check the oil level but not in neutral but in park with the engine running cold.