Your comments
Here another one.
After matching the scope at the cursor, white keyboard appears over the dark one

This is my testing sample:
{
"string": "${3:test}",
"append": "${1:sample}: ${1/.*/\\u/g}"
}
The idea is to make the value entered in the first line uppercase, but it just returns the cursor to beginning of line
Can you provide a working sample for "transformations"?
i mean "transformations" for code compltion, something like this {"string": "scale2", "append": "(${1:0.5}${1/(.+)/(?1:, )/}${2:0.5});"},
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