[Bug] Red X on choosing provided mod

Background

Operating System: Gentoo Linux
CKAN Version: 1.26.{8,10} (works on 1.26.6)
KSP Version: 1.8.1
Mono Version: 6.6.0.161

Problem

$ mono ./ckan.exe 
System.IndexOutOfRangeException: Index was outside the bounds of the array.
  at System.Windows.Forms.ListView.GetItemLocation (System.Int32 index) [0x00018] in <91b18fcffc5e47d3a5d52c9f469a1a52>:0 
  at System.Windows.Forms.ListView.get_LastVisibleIndex () [0x00043] in <91b18fcffc5e47d3a5d52c9f469a1a52>:0 
  at (wrapper remoting-invoke-with-check) System.Windows.Forms.ListView.get_LastVisibleIndex()
  at System.Windows.Forms.ThemeWin32Classic.DrawListViewItems (System.Drawing.Graphics dc, System.Drawing.Rectangle clip, System.Windows.Forms.ListView control) [0x00011] in <91b18fcffc5e47d3a5d52c9f469a1a52>:0 
  at System.Windows.Forms.ListView+ItemControl.OnPaintInternal (System.Windows.Forms.PaintEventArgs pe) [0x00011] in <91b18fcffc5e47d3a5d52c9f469a1a52>:0 
  at System.Windows.Forms.Control.WmPaint (System.Windows.Forms.Message& m) [0x0006d] in <91b18fcffc5e47d3a5d52c9f469a1a52>:0 
  at System.Windows.Forms.Control.WndProc (System.Windows.Forms.Message& m) [0x001a4] in <91b18fcffc5e47d3a5d52c9f469a1a52>:0 
  at System.Windows.Forms.ListView+ItemControl.WndProc (System.Windows.Forms.Message& m) [0x00071] in <91b18fcffc5e47d3a5d52c9f469a1a52>:0 
  at System.Windows.Forms.Control+ControlWindowTarget.OnMessage (System.Windows.Forms.Message& m) [0x00000] in <91b18fcffc5e47d3a5d52c9f469a1a52>:0 
  at System.Windows.Forms.Control+ControlNativeWindow.WndProc (System.Windows.Forms.Message& m) [0x0000b] in <91b18fcffc5e47d3a5d52c9f469a1a52>:0 
  at System.Windows.Forms.NativeWindow.WndProc (System.IntPtr hWnd, System.Windows.Forms.Msg msg, System.IntPtr wParam, System.IntPtr lParam) [0x00085] in <91b18fcffc5e47d3a5d52c9f469a1a52>:0

It's the ChooseProvidedMods tab:

Presumably related to #2966's refactoring of the tab pages.

Last time we saw a red X bug: #2499, #2501

See:

KSP-CKAN / CKAN

[Bug] Red X on choosing provided mod #2988

Background

Problem