Also, bug reports often are not bugs and when they are bugs are typically rapidly fixed and therefore are very release specific. A thread dedicated to bug reports (true or not) would not naturally go away once bugs are fixed and thus would be flled with basically meaningless pieces of outdated junk. Real bugs can be reported on our official github site:
https://github.com/Sigil-Ebook/Sigil
Or here on MR, typically in the release announcement thread that it was discovered in. MR is aleo a good place if you are unsure if something is a bug or not and can get support from a number of users as well as the current developers.
That is why there is no dedicated bug reporting thread on Sigil.
KevinH