Bug with TXT field

[SerebryanskiySergei]

When I'm trying to create advert with field in TXT part, that have a dot inside, it separates in several fields.
Creating:
...
txt: {
api_proto: protocol,
api_ver: 'v1.0',
// deprecated
pri: paramsPriority
}
...

Result:
txt: [
"api_proto=http",
"api_ver=v1",
"0",
"pri=100"
]

I've tried to put escape character \ before dot ( api_ver: 'v1.0', ) but result is the same.

[kmpm]

Do you have any code examples?