Pilot landing a tailwheel aircraft reported the main gear malfunctioned upon initial touchdown resulting in a runway excursion due to loss of control.

Narrative

The aircraft is an open cockpit biplane. This was my second flight in this particular aircraft. I am an ATP; CFI; and current tailwheel pilot. I have previous recent experience in the same model aircraft as well. They are unfortunately known to have poor landing characteristics; and since the aircraft is new to me; I have been diligent in preparing for these flights. This included flying with a CFI in a tailwheel as a refresher; and also flying another biplane to prepare for flying this aircraft. Winds were light and down the runway; clear skies; and good visibility. It was a perfect day for flying. Upon completing a normal takeoff and remaining in the pattern; I set up for a normal 3-point landing. Final approach and touchdown were normal; on the centerline; and without any side-loading with the stick fully aft. However; after the initial touchdown; the landing gear struts did not behave normally. The landing gear on this aircraft consists of a negative camber and a spring/oil dampening strut. In a flying attitude; the landing gear hangs down in an almost extreme narrow stance with a negative camber. In a normal touchdown; the landing gear should compress evenly and become wider. In this case; after touchdown; the left strut compressed but the right strut did not. The term would be a hung strut or a bound strut; with it being unable to compress. In this case because of the camber; the aircraft skidded to the left along with the left wing scraping the runway lightly. Recovery technique was attempted. When the right strut finally compressed; the stiffness of the struts caused an immediate opposite rotation. The aircraft's right wing scraped; and the airplane rotated around the left wheel. The aircraft came to a stop off the left hand side. Tower was notified that the engine was stopped; and airport OPS was called to assist. There is no starter on this airplane. There was no prop strike; and only minor scuffing to the wingtips and one wheel rim from the side load. No damage occurred to the airport runway or lighting system; and there were no injuries.I do have to thank the airport operations manager for quickly helping. Per 49 CFR 830.2; this was not an accident; and it did not fall under 49 CFR 830.5(a) requiring immediate notification. I have thought about what could have been done to mitigate the ground loop; and I wish that I could have been able to recover properly from the initial left wing low attitude. The touchdown was normal; but the outcome was not.