Sorry I reply to my own post, but after hours of research and testing I found out that the issue is with having two receiving addresses in my old wallet.
So in my old wallet I have:
[PRIV_KEY]
[ADDRESS_1] (this address doesn't have any BTC, doesn't have transactions)
[ADDRESS_2] (this address
has BTC, has transactions)
When I click on import and I put in text form:
I have this wallet imported (I see "default_wallet [imported]" in window header) but balance is "0". In "Addresses" tab I see my [ADDRESS_1].
When I click on import and I put in text form:
I have this wallet imported (I see "default_wallet [imported, watching only]" in window header) but balance is "0".
When I click on import and I put in text form:
I have this wallet imported (I see "default_wallet [imported, watching only]" in window header) and I SEE MY BTC AND TRANSACTIONS! (but this wallet is in "watching only" mode)
So how to import my private key with second address or with both addresses?
I tried:
p2pkh:[PRIV_KEY] -> [ADDRESS_2]
p2pkh:[PRIV_KEY]->[ADDRESS_2]
p2pkh:[PRIV_KEY]-[ADDRESS_2]
p2pkh:[PRIV_KEY] - [ADDRESS_2]
p2pkh:[PRIV_KEY] [ADDRESS_2]
I also tried
p2pkh:[PRIV_KEY]
[ADDRESS_2]
But every time "next" button is disabled