vision ward range bug

I haven't noticed it happen this week. but there is an issue I've been noticing. before the newest patch I'm pretty sure that a ward inside the pit could see all of the pit, but this season if the stealth/trinket ward is at the way back it isn't seen. and I mean like, if you put the ward as close as you can to dragon or baron and they auto-knock it back, it's too far to see the ward.

also, I've noticed a few times when I place the pink ward anywhere and it reveals a ward at about max range, but after a second that ward is no longer revealed. and I know it didn't die and wasn't just placed, because I can see its timer and also it doesn't show any ward death animation, but the ward stealthing animation. ( i thought at first that it happened because the dragon knocked the pink away, but then I saw this happen a few more times at other places of the map.)

so between the two things here, I think there is a bug with vision wards where their range isn't what it's supposed to be.