Missing values when used parse's collect into _ any combination

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This is ok:

parse "a11b22" [collect any [keep skip keep 2 skip]]  
== [#"a" "11" #"b" "22"]

But when collecting into an existing block, that it is not:

>> o: copy [] parse "a11b22" [collect into o any [keep skip keep 2 skip]]  :o
== [#"a" #"b" "22"] ;= missing value!

Without the any it is ok:

>> o: copy [] parse "a11b22" [collect into o [keep skip keep 2 skip]]  :o    
== [#"a" "11"]

This is also not correct:

>> o: copy [] parse "a11b22" [some [collect into o [keep skip keep 2 skip]]]  :o
== [#"b" "22" "11" #"a" "11"] ;== should be [#"b" "22" #"a" "11"]