So many "bugs" affecting gameplay lately that have not been commented/mentionned by rioters

"bugs" or nerfs, depends on the case I'll give you the 3 ones that directly come to my mind : -Diana's Q hitbox is buggy as fck and has been so for a patch already (link of a post giving clear examples : https://boards.na.leagueoflegends.com/en/c/bug-report/vHdhM8Vc-diana-q-bug-not-hitting-targets-that-are-clearly-hit) -Katarina's R wont activate if you dont have vision of the opponent, while it could work since her 1st release (https://boards.na.leagueoflegends.com/en/c/bug-report/VlddyBYh-katarina-r-wont-activate-even-when-enemy-is-in-range-but-not-visisble-gameplay) -Mordekaiser randomly getting 2 bugs directly affecting him in game (there was a thread on this but I cant find it out)

Please let us know if these are intentional changes, why they happen and what is going to be made to fix them, if they will be fixed. These are only 3, but this should apply to everything, really.