2 Bugs for the pirce of one. Poppy ult cast bug and Poppy-Heimerdinger turrets bug [Gameplay]

These are 2 different bugs I have encountered with Poppy already many times and I will describe both.

Concerning the ultimate bug, in normal situation Poppy casts her ultimate, starts channeling with the according animation and if after 4 seconds you don't use it, the animation stops and her ultimate his reset to a 30 second cooldown. The following bug already happened to me about 4 times in different games (and I'm still not 100% sure how and why). I used "r", began channeling the ultimate, the 4 second window ended, the animation ended, but the cursor indicating the ultimate range (in max range) remained. When I left clicked, about 10 seconds after I cast the skill, I still used my ultimate at max range, in some of the situations I wasted my ultimate, in another one I will admit, I used the bug to my advantage. Nevertheless this should not happen.

The second bug happened in two different games (the two games I had a Poppy vs Heimerdinger match-up). I'm in Heimer's turrets range, which auto-attack me normally, I used my e-dash to get away from the turret, and the turret keeps on attacking me way out of it's max-range capacity. It happened with both Heimer small turrets and with Heimer's turret with ultimate. Not sure how to describe the distance, but Heimer's turret was placed more or less at the max-range of the blue-side first top turret and it was attacking me while I was in river near the tribush.