Not experienced this in Hot weather, but at the moment I;m getting intermittent(delayed) indicator switching when its frosty/very cold temp. I can wait up to 5 seconds for them to activate. I presumed my problems were due to contraction due to cold temperature but not sure how this effects in hot temps??
Did you manage to solve the issue? I've actually purchased a new stalk module from ebay to see if this fixes my problems?
Sorry i cant be any help but was just interested in what/if you discovered anything to solve this?