Can any session of Wild Heart be predicted?
Decide your stake and session budget before the first spin. How often the bonus round comes is not known in advance, and the result of one session is random whatever the RTP. A high RTP does not mean a short losing run, so keep the budget you can afford to lose.
Check the RTP version before you stake, because it is shown only in the game rules. Open the rules inside Wild Heart and read the version line before you place your first bet. Do not stake until you have read it.
Read the maximum win as a ceiling, not a target. Wild Heart pays up to x2,820 of the bet, and that ceiling is reached very rarely. No stake size or streak of spins makes it more likely on any given spin.