Combipow doesn't add single characters between words

[Snoopy]

combinator and combinator3 generating passes with . inside like

word1.word1

maybe you found a bug of combipow while handling special chars (the dot is any sign in every regex)
can you open a github issue? otherwise i can do this for you

EDIT:
playing around
file
.
.
results in
.
.
..
which is wrong, should be
.
..
file
.
.
1
results in no output, so yeah, there seems a problem with the .

EDIT 2:
when looking at the wiki and the given example for combipow, there are missing combinations already like
XYZabc123

so it seems a basic problem with combipow