Separator lines drawn incorrectly in Simulator

[mleonhard]

Separator lines in form and grouped-row-table widgets appear in the wrong places. This happens only in Simulator and only one the first page view. The separators draw properly on real iPhones and after refreshing or updating the page.

Here is the code that draws the separators:

applin-ios/Sources/ApplinIos/view/column_view.swift

Lines 96 to 125 in 7b19c18

	override func draw(_ rect: CGRect) {
	// TODO: Fix bug on Simulator which causes lines to be in the wrong place on first load. See Checkboxes demo page.
	if let color = self.separatorColor, let ctx = UIGraphicsGetCurrentContext() {
	// Draw a line left-to-right between subviews
	let left = 0.0
	let right = self.bounds.size.width
	ctx.setLineCap(.round)
	ctx.setLineWidth(CGFloat(SEPARATOR_THICKNESS))
	ctx.setStrokeColor(color.cgColor)
	ctx.beginPath()
	if let first = self.orderedSubviews.first, let sepThickness = self.separatorThickness() {
	let y = first.frame.minY - CGFloat(sepThickness / 2.0)
	ctx.move(to: CGPoint(x: left, y: y))
	ctx.addLine(to: CGPoint(x: right, y: y))
	}
	for (n, a) in self.orderedSubviews.dropLast(1).enumerated() {
	let b = self.orderedSubviews[n + 1]
	let y = (a.frame.maxY + b.frame.minY) / 2.0
	//Self.logger.trace("draw (\(left), \(y)) -> (\(right), \(y))")
	ctx.move(to: CGPoint(x: left, y: y))
	ctx.addLine(to: CGPoint(x: right, y: y))
	}
	if let last = self.orderedSubviews.last, let sepThickness = self.separatorThickness() {
	let y = last.frame.maxY + CGFloat(sepThickness / 2.0)
	ctx.move(to: CGPoint(x: left, y: y))
	ctx.addLine(to: CGPoint(x: right, y: y))
	}
	ctx.strokePath()
	}
	}

It seems that UIKit calls draw before laying out the views. Or it fails to update each view's frame field. I have spent many hours trying to find a workaround. If anyone has ideas, please post them here.