That's close to Standard Day. I would not think they would be an issue. I would if it were hotter out and the humidity was high too. However, something is causing the AC to "think" there is additional drag on the motor(s).
Do you have a test bench? If so, strap it down, take three props off and run her up to 50% power with the one prop. If you do or don't get the error move to the next motor. If this next motor does not throw the error, move on to next and test again. What we're doing is checking if there could be a bad/weak motor. If you get only one motor throwing the warning, then you have your answer. If it happens to more than one, I honestly can't say much more. If you get no errors on any of them, I would next try by installing the factory props on three and a CF on one, then do the whole process again. Keep trying different combinations - maybe with two OEM's and two CF's and run the rotation etc. = Four test runs w/this set up.
To really get a true bench reading/test, get a laser thermal meter at HomeCrapo (<$30) and start the process with only the OEM prop. Read the temp of each motor at the top of the casing center of the shaft and the casings edge after they have been running for ~30sec.
Write your findings down while keeping track of which motor is which. e.g. M1=65C, etc. ( M1 would be the left motor as if you were riding in it and M3 would be the back left ).
Collect this Data for all tests and post it. It will tell a lot about the efficiency of DJI motors and if you have one that is weak.
Does anyone here just enjoy their I2 and fly it without all of the involved testing and retesting? Seems like many spend more time looking for problems than just flying and enjoying it.