LCS vs Normal Servers

So, the pauses in LCS have always prompted a question in my mind, with today's CLG vs TSM minion health bar bug being the main reason for this post: What is different about the local servers that the LCS players play on stage vs the normal servers you and I play on every-day? Of the 100s and possibly 1000s of games I've played, whilst there are the odd bugs every now and then, I have yet come across bugs such as minion health bars not going down, or champion health bars displaying incorrectly (as was the case I believe last split with a game involving Viktor). Yet, all these bugs occur on the LCS stage? Is it just because I'm too much of a rookie to notice these things? Or is there a technical reason behind this?
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