I’ve had similar issues with clear resin. At your specs, you are likely hitting limits where the bulging and distortion is caused by light bleed and peel forces. I’d suggest increasing the wall thickness to at least 0.7-0.8 mm. Thinner walls will likely bulge or warp during printing and post-curing. Also, printing your part at an angle (30-45°) will help with distortion by minimizing peel forces. You can also add fillets at the wall bases to reduce stress. For clarity, you can post-process with fine sanding and a clear resin dip. Hope this helps.