!important; /*default transparent text, program crashes when another rtf fall from the filter set*/

[KenKennedy-UNOFFICIAL]

Hellow Dan-Bryan
The issue is that when I added transparent text from the generator menu, above the timeline, without deleting the default text, I discovered that this was the reason the program was crashing without explanation.

Although two RTF text filters could be added without problems, if I didn't delete the default text, when I applied my set of filters:
size, position and rotation + rich text + alpha channel adjustment... shotcut crashed.

[Debug  ] <TimelineDock::setSelection> Changing selection to QList(QPoint(0,1))  trackIndex -1 isMultitrack false 
[Info   ] <Util::isMemoryLow> available RAM =  7523708 KB 
[Debug  ] <autosaveTask> Function autosaveTask finished in 7 ms.

That's when it occurred to me to delete the default text that suggests "type here" to the user, and then add the set of filters. This time it worked.