When followed by dictionary with more than one entry in a list, a grammar statement is removed by mistake. The following configuration illustrate the issue: ``` foo: - on amd64 to riscv64: - bar1: baz1 - on amd64 to arm64: - bar2: baz2 - bar3: baz3 bar4: baz4 ``` When building for `riscv64`, the first statement (the `on amd64 to riscv64` section) is finalized when dealing with the second one. Then the second one (the `on amd64 to arm64` section) is excluded (not matching the target arch). So this is producing the expected primitives. When building for `arm64`, the first statement is finalized (and later ignored) when dealing with the second one. But the second one is removed by mistake in `_parse_section_dictionary()` when looping over entries in the last dictionary (specifically when handling `bar4: baz4`). So the only resulting primitive will be the last element of the list. See https://github.com/canonical/craft-grammar/commit/67816503fd77f033d27276720c14d621cd537009 showing a broken test.