According to Osho, feeling both at home and lost in the Buddhafield is natural; there is no contradiction. As your egoic, separate identity melts in the Master's love field, you feel 'lost.' Simultaneously, a new, impersonal being arises, merged with the whole, bringing a deeper sense of home. This is the simultaneous death of the old and birth of the new, ripened through meditation's surrender into non-being.
You're letting go of your old 'me' and becoming part of something bigger, so it feels like getting lost and finding home at once.