When my Minecraft bedrock got updated to 1.21.30. I notice there was a texture Error On Copper Grate block. The copper grate block use to look like rainbow virus but then it turned Black completely, however water looks dark. I don't know what causes this bug but I do know that this has something to do with slime/Banner couldn't Render behind copper grate or water...? When this got fix but it causes texture Error On my S22. My little brother play this on A23 and he didn't had this issue. So this bug may occurred on some devices but I can't confirm this.