General description of bug:

• What happened: starting fastfetch in .zshrc produces output without OS icon and colors i.e. same if I were to use --pipe true
  running fastfetch once the terminal is running it shows properly
• What should happen: it should print the logo and colors
• Did it work in an older version: yes worked on 1.11.3
• Where did you get the binary: AUR, updated via yay
• Does this issue still occurs in the latest dev build? not tested

Often helpful information:

Output of fastfetch --version:

$ fastfetch --version         
fastfetch 1.12.0 (x86_64)

shell is zsh

$ zsh --version
zsh 5.9 (x86_64-pc-linux-gnu)

terminal terminator or xfce4-terminal

$ terminator -v     
terminator 2.1.3

$ xfce4-terminal --version
xfce4-terminal 1.0.4 (Xfce 4.18)

Currently fixed by adding fastfetch --pipe false to my .zshrc