Well like the title has brake failure warning light came on… On 2021 spider RTL… At 500 miles or so went for a ride on a hot day and failure warning light came on… Looked on the Internet and spider lovers came up… Most post said to add a little break fluid to the reservoirs… Did that and it seemed to take care of it ..... A couple rides and a few more miles down the road around 700 miles now on the bike and it happens again on a hot day… Ended up sitting in the shade for a while and the Warning went away… Fixed it self I guess… My question is… Is this a known issue with the 2020 and 2021s RTL’s… Anybody else have this happen to them?… PS… The brakes feel no different before or after brake warning light comes on and off… Seems to be heat related though… Any thoughts would be appreciated