zsh custom completion file not sourced properly

I encountered a strange behaviour regarding ZSH completion for my custom script and need some ideas, what went wrong and how to solve it. I have written a little custom script myscript and also created a corresponding completion script _myscript. The latter begins with the following lines as usual: #compdef myscript (also tried #compdef _myscript myscript with same result). At the beginning I had both files inside my ~/.local/bin directory, which is part of my $PATH. I also added it to my $fpath so ZSH could find the completion script. So far, so good. Everything worked fine with the completion of the myscript command. But then I moved both files to my **.dotfiles** to share them through the corresponding git repo. My dotfiles contain a folder for completion script which is also part of my $fpath. But when moved to this subdirectory of my dotfiles, completions stopped working... I removed .zcompdump to renew the completion assignments and tested different syntax to add the directory to my $fpath, but nothing helped. I also called compinit manually after removing .zcompdump to be sure it is called after all assingments were executed. The first strange thing is, that other completion scripts inside the dotfile directory are recongnised by ZSH completion system as it also contains the completion scripts for my rustup and cargo command. When grepping .zcompdump after the different steps I tried, it always shows the assignments for both those commands but not for myscript. The second strange behaviour is, that when I move the completion script back to the ~/.local/bin dir and restart ZSH, it suddenly recocgnises the script and completions start working again. And now I can also grep it inside my .zcompdump Now I'm running out of ideas what could be the reason, especially since rustup and cargo completion is working properly from the same directory. It would be much more comfortable to have all my custom completion working from my dotfiles, so I can use them on different machines without much manual configuration. Of course, I know I could hardcode the completion assignment inside my zshrc, but thats also not as portable as the regular fpath It may be a minor aspect I'm missing, but hopefully someone knows the solution. I can't offer much code, since it seems not to be due to my scripts code. JFYI: I'm running Manjaro Linux (with predefined ZSH setting, which I already checked).