Capt. Manuvar.
If the glider doing a climbing turn to the right was a problem to you then you were not allowing enough clearance twixt you and him. Do you look behind you before you turn?
Gliders are always likely to make sudden turns or to climb and slow down, (porpoising) when they encounter lift.
I forgot to put the u/c down once, fortunately it is only semi-retractable and the engine is a pusher located above the tail boom. Just rather a bumpy take off later as there's no suspension in that configuration.
Mike W