Maybe Isiah Kiner-Falefa thought he was called out.

Maybe he thought that Yankees catcher Jose Trevino had hit a foul ball.

But regardless of the reason, Kiner-Falefa popped up from his slide after stealing second base in the fifth inning — when he was called safe — and started heading back toward first base.

Marcus Semien tagged Kiner-Falefa, and he was, at that point, called out.

It was a strange sequence in the fifth with the game tied at 1-1.

Kiner-Falefa had led off the inning against his former team with a single, lining a ball that third baseman Josh Jung couldn’t corral.

Then, Kiner-Falefa turned what would’ve been his ninth stolen base of the season into his fourth time getting caught.

After attempting to tag Kiner-Falefa on the slide, Semien even appeared frustrated at the safe call at second.

Semien then followed Kiner-Falefa’s strange jog down the baseline and tagged him out.

But this wasn’t even Kiner-Falefa’s first miscue of the night.

In the fourth inning, when the Rangers had a runner on first with two outs against Yankees starter Clarke Schmidt, Kiner-Falefa made an error that cost the Yankees a run.

Leody Taveras popped a ball into shallow center, but Anthony Volpe lost the ball’s trajectory.

Kiner-Falefa kept charging, but he didn’t dive, and the ball fell for a single.

The ball then went underneath his glove for an error, allowing Ezequiel Duran to score from first the Rangers’ first run of the game.

Once a full-time infielder with the Rangers and Yankees, Kiner-Falefa has emerged as a consistent piece of the Yankees’ outfield rotation this season after losing the shortstop battle to Volpe.

He’d made just one error at his new position this season — in a May 30 victory against the Mariners — and his time in the lineup increased with injuries to Harrison Bader and Aaron Judge, along with inconsistencies at the plate from Oswaldo Cabrera.

The first error didn’t matter in a blowout victory.

But the second error, on Friday night, prevented the Yankees from holding an early lead as their offense struggled again.

But Kiner-Falefa did make some amends late in Friday’s game, as he singled and scored the tying run on a sacrifice fly in the eighth.