If reversing the shock makes the issue go away then I’d be replacing the bushings, could just be a case of tolerances not playing ball (largest tolerated mounting hardware with bushing having the smallest tolerated internal diameter trading to binding).
Had a problem with bushings that were too tight and the frame flexing laterally a few mm. It caused the shock to bind inside and scored the inner shaft. Since then I’ve been using nylon Bushings with a little play so the shock can move as the frame flexes.
I had a similar issue with my DBInline on my Rocket. A few weeks after I’d had the shock serviced and paid for a new air shaft and air can out if the blue a new bushing arrived from Cotic stating there had been a small batch issue some shocks causing premature wear. I had the same problem at the next service too, with only 50 hours on the shock, new air can and shaft again. Haven’t used the bike since then but if it needs another aircan and shaft next time I’ll be properly peeved. Have had the frame checked for alignment by a local shop and it’s completely straight with new bearings so maybe the Cane Creek shocks are just not very loerant of side loading.