Confirmed Nested lists do not round-trip as expected when toggling bb-code mode on/off

[Xon]

Affected version

2.2.13

Toggling the following bb-code causes the DD line to evaporate and a bunch of new lines to be unexpectedly added.

[LIST]
    [*][B]AA
    [LIST]
        [*][B]BB[/B]
        [*][B]CC[/B]
    [/LIST][/B]
    [*][B]DD
    [LIST]
        [*][B]EE[/B]
        [*][B]FF[/B]
    [/LIST][/B]
[/LIST]

This is the mangled bb-code output

[LIST]
[*][B]AA
    
[LIST]
[*][B]BB[/B]
       
[*][B]CC[/B]
   
[/LIST][/B]
   
[LIST]
[*][B]EE[/B]
       
[*][B]FF[/B]
   
[/LIST]
[/LIST]

This impacts the final html output. Instead of;

• AA
  
  • BB
  • CC
• DD
  
  • EE
  • FF

It renders;

• AA
  
  
  • BB
    
  • CC
    
  • EE
    
  • FF