Different locations on earth upon finishing the quest for riven when the pleyer moves to a new objective OR leaves the area (plains of whatever on earth ) the riven progress get resetted to 0.
Mastery quest 28 when a warframe gets the second or later canisters to throw them on the ground in order to make the mobs vulnerable he can't throw the canister.
Guys... I know you made a new patch but this patch is the first one that makes me make a bug report and if I have to be honest the game has a TON of bugs at the moment and I am not talking about some fringe bugs that happen every now and then but very obvious very easy to recreate things... Get a better QA team.