Resolving bugs take from one day upon more few days to years. Depends how hard it will be to fix that bug.

You can report bugs through this link below but before check here if it isnt already issued:

https://github.com/TrinityCore/TrinityCore/issues/new/choose

You also can report bugs through our Discord Server via the Ticket System only if the bug is non-tdb related. That means, because we are using a database that is already much more developed, report accepted to our developers.