draws on price panel but opens second panel as well

[cshox]

I have a simple custom indicator that uses the following to draw a few lines and rectangles:

• Draw.HorizontalLine(this, "tag1", false, Open[0], Brushes.Purple, DashStyleHelper.Solid, 2);
• Draw.Rectangle(this, "tag2", false, Time[2], LowY, Time[2].AddDays(6), HighY, Brushes.Silver, BrushFill, 25);

No fancy logic, just draws stuff in OnBarUpDate() against OnBarClose.

For a while it just drew on the price panel and then randomly started to open a second panel but still draw on the price panel. Second panel is blank.

Here's what I've tried to rectify the problem:

• Add, remove, add the indicator
• Close chart and open a fresh char and add back the indicator
• Add the SMA indicator in addition to my custom one
• Comment out ALL code leaving just IsOverlay = true, DrawOnPricePanel = true; and a return in OnBarUpdate().
• Comment out ALL Code leaving just a return statement - no defaults
• Recompiled and reapplying indicator repeatedly during and between all these steps
• Restarted NinjaTrader a few times along the way
• Manually set panel to "same as input series", apply, remove indicator, apply indicator again

I can place something like just SMA on chart and it works fine. When I go back to custom indicator the second panel appears again. I've run out of ideas.

Suggestions please.
Thanks,
Clint