I was using an ATTiny85 running the Adafruit Neopixel library with 7 ws2812b and the ADCTouch library for capacitive touch and when I added your library when ever I would set pin pb1 HIGH pb4 would also get set high.
I tried the basic code for every library to see what was causing this bleeding to pin pb4 and after removing this library the ATTiny85 started working the desired way and I was no longer seeing any bleeding on pin pb4.
After doing a ton of research I have concluded that this problem even though fixed when not using your library does not originate from this library. Sorry to bother you.
I was using an ATTiny85 running the Adafruit Neopixel library with 7 ws2812b and the ADCTouch library for capacitive touch and when I added your library when ever I would set pin pb1 HIGH pb4 would also get set high.
I tried the basic code for every library to see what was causing this bleeding to pin pb4 and after removing this library the ATTiny85 started working the desired way and I was no longer seeing any bleeding on pin pb4.