SLA print warping

[strawberry]

warping happen after some day. like some internal stress???uneven printing temperature?? it comes out almost perfect but then it is meh
I broke one sample but got worse(couldn't put peaces back)
one sample came out fine

wall thickness 3mm L=200mm H=30mm box
acrylic resin

[thm_w]

Did you UV cure?

https://www.linkedin.com/advice/3/how-do-you-avoid-warping-cracking-your-sla-prints