I don't see pushing the boundaries of a larger new enclosure itself a sign of distress but seeing 86 as the ambient temperature might be a sign. Ambient should be in the low 80s to upper 70s and it may indeed be a tad too warm.
Edit: seeing a CHE inside the enclosure terrifies me. Not sure why people in Europe and the UK think having a heat lamp or CHE surrounded by a wire cage that is also heated by the CHE is acceptable. Also, did you tape down the probe cords?! Are the thermostat probes for the UTH on the inside of the enclosure?
Edit 2: GET THAT INTERNAL CHE OUT OF THAT ENCLOSURE!