Render distance automatically sets to 94 chunks when opening a game

Problem - Render distance automatically reverts to maximum 96 chucks when starting some games.  These are worlds that have already been played in e.g. my 12k day world.  I normally have it set to 32 chunks, but it will often and has done for at least 6 months reverts to 96 chunks on its own.

I only realise when my computer becomes very sluggish and when I can suddenly see much further than I should.

Fix: - go back into settings and manually override the video settings 

Recreate: - I have only ever noticed it happen when entering a world.  I will have left it at 32 chunks and when I load 'sometimes' it is 96 chunks.  Not all of the time and I do not know why.

I can't see this elsewhere to log and am only logging it as I saw it happen to Eckosoldier in one of his videos so it wasn't just me.