[CLIENT] Invisible minions and unmovable cam

During last months I've had an increasing amount of problems using the Mac Client. There are 2 problems:

1. The cam refuses to move and no click is registered unless it is a double click. Essentially, this means that if I want to visit the shop, I need to double-click. If I want to buy an item, double click. Move my champion, double click. Simultaneously with this problem goes that the only way to move the cam is by double-clicking on the minimap. Only workaround I got is to exit the game and reconnect, which leaves my team with a disadvantage due to lost levels and minions.

2. Invisible minions and monsters. Especially when I got a ping above ~60, minions and monsters tend to disappear leaving only their particles. My client allows me to move straight through minions (without Phantom Dancer) however I do take damage from minions.

Problem 1 arises mostly when a.) other apps are running on the background or b.) when loading screen takes really long. Sadly, it is not reproducible every single time, problems occur seemingly random.

Are there any fixes or workarounds for these problems?