A minimal example showing the lagging drag issue

DragIssue.kt

import androidx.compose.foundation.Canvas
import androidx.compose.foundation.ExperimentalFoundationApi
import androidx.compose.foundation.gestures.onDrag
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.offset
import androidx.compose.foundation.layout.size
import androidx.compose.runtime.*
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.platform.LocalDensity
import androidx.compose.ui.unit.DpOffset
import androidx.compose.ui.unit.IntOffset
import androidx.compose.ui.unit.dp
import androidx.compose.ui.window.Window
import androidx.compose.ui.window.application


fun main() = application {
    Window(onCloseRequest = ::exitApplication) {
        DragDropExample()
    }
}

data class Entity(
    val offset: DpOffset
)

@Composable fun DragDropExample() {

    var entity by remember { mutableStateOf(Entity(DpOffset(100.dp, 100.dp))) }

    Canvas(
        modifier = Modifier.fillMaxSize()
    ) {
        drawRect(Color.White)
    }

    Entity(
        state = entity,
        onDrag = {
            entity = entity.copy(offset = entity.offset + it)
        }
    )
}

@OptIn(ExperimentalFoundationApi::class)
@Composable fun Entity(
    state: Entity,
    onDragStart: () -> Unit = {},
    onDrag: (DpOffset) -> Unit = {},
    onDragEnd: () -> Unit = {}
) {
    with (LocalDensity.current) {
        Box(
            modifier = Modifier
                .offset { IntOffset(x = state.offset.x.toPx().toInt(), y = state.offset.y.toPx().toInt()) }
                .onDrag(
                    onDragStart = {
                        onDragStart()
                    },
                    onDrag = { onDrag(DpOffset(x = it.x.toDp(), y = it.y.toDp())) },
                    onDragEnd = { onDragEnd() }
                )
        ) {
            Canvas(
                modifier = Modifier.size(100.dp)
            ) {
                drawRect(Color.Red)
            }
        }
    }
}

And an accompanying screencast:

Screen.Recording.2023-04-28.at.13.41.29.mov