Isn't this a fold to a bet preflop?
Known players:
[tg]Hero$2,62:///////;BU$4,97:///////;BB$2,70:///////;MP3$9,25:///////;SB$8,13:///////;[/tg]
0,01/0,02 No-Limit Hold'em (5 handed)
Hand recorder used for this poker hand: PokerStrategy Elephant 0.50 by www.pokerstrategy.com.
Preflop: Hero is CO with A♠, 9♠
MP3 raises to $0,06, Hero calls $0,06, BU calls $0,06, SB folds, BB calls $0,04.
Flop: ($0,25) T♥, A♦, 5♠ (4 players)
BB checks, MP3 checks, Hero bets $0,20, BU raises to $0,40, 2 folds, Hero calls $0,20.
Turn: ($1,05) 9♥ (2 players)
Hero checks, BU bets $0,52, Hero raises to $2,16 (All-In), BU calls $1,64.
River: ($5,37) 5♦
Final Pot: $5,37
Is the play postflop fine?