Bug report via internal suggestion

[FlamyEX]

Attempted to edit flavor text on an M15 Standard frame. Could not click on the flavor text box, so pressed down from the rules text to attempt editing it. This led the cursor to position itself at the position behind the start of the rules text.
Upon attempting to input text, the following error occurs:

An internal error occured:

invalid string position
Please save your work (use 'save as' to so you don't overwrite things)
and restart Magic Set Editor.

You should leave a bug report on https://github.com/twanvl/MagicSetEditor2/issues/
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Call stack:
[00] 00007FF6F82B4647
[01] 00007FF6F8727DF0
[02] 00007FF6F86D11D0
[03] 00007FF6F86D00A6
[04] RtlCaptureContext2                      
[05] 00007FF6F8254EAC
[06] 00007FF6F84A5C58
[07] 00007FF6F84D78AF
[08] 00007FF6F84D752F
[09] 00007FF6F84D86FC
[10] 00007FF6F84D77DA
[11] 00007FF6F84D82EA
[12] 00007FF6F831D3F8
[13] 00007FF6F8320F58
[14] 00007FF6F832785F
[15] CallWindowProcW                         
[16] DispatchMessageW                        
[17] IsDialogMessageW                        
[18] 00007FF6F831FFEF
[19] 00007FF6F842466F
[20] 00007FF6F84246C2