Type Error when creating new BE User

[thomasstranz]

Strange Error when trying to create a BE user that happens most of the time, but not always.

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DateTime::createFromFormat(): Argument #2 ($datetime) must be of type string, float given

in vendor/in2code/in2publish_core/Classes/Features/MetricsAndDebug/Stopwatch/Exception/StopwatchAlreadyStartedException.php line 25

public function __construct(float $firstStart, Throwable $previous = null)
{
    $this->firstStart = $firstStart;
    $readableDate = DateTime::createFromFormat('U.u', $firstStart)->format('Y-m-d H:i:s.u');
    parent::__construct(sprintf(self::MESSAGE, $readableDate, $firstStart), self::CODE, $previous);
}

at DateTime::createFromFormat('U.u', 1778662252.377407)

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Right after the error occurs: I add a regular element on any page and and try creating a BE user again and it succeeds

TYPO3 12.4.42
in2publish 12.3.5
in2publish_core 12.5.6
PHP 8.3