Piettech dht library not working?

As mentioned in my previous post, I’m trying to restart my stalled Photon project, but having a couple of problems. One is the lcd display. One is that the Piettech DHT library doesn’t seem to be working anymore, it just reads -5 as the temperature. I switched back to the Adafruit DHT library and I’m getting temps and humidity again. Is this the work of the new firmware? Piettech’s library used to be the more reliable of the two DHT libs.

Anyway, this isn’t a major problem (since the Adafruit lib works), but I just thought it was odd and wondered if anyone else has noticed the same/ discovered the cause/ found a solution.