Random Server Crashes (EntityLookHelper)

[Unfy]

Error: Argument 1 passed to pocketmine\entity\helper\EntityLookHelper::setLookPositionWithEntity() must be an instance of pocketmine\entity\Entity, null given, called in phar:///home/container/PocketMine-MP.phar/src/pocketmine/entity/behavior/MateBehavior.php on line 60
File: src/pocketmine/entity/helper/EntityLookHelper
Line: 46
Type: TypeError

Code:
[37] protected $isLooking = false;
[38] protected $posX = 0;
[39] protected $posY = 0;
[40] protected $posZ = 0;
[41]
[42] public function __construct(Mob $mob){
[43] $this->entity = $mob;
[44] }
[45]
[46] public function setLookPositionWithEntity(Entity $entity, float $deltaYaw, float $deltaPitch) : void{
[47] $this->setLookPosition($entity->x, $entity->y + $entity->getEyeHeight(), $entity->z, $deltaYaw, $deltaPitch);
[48] }
[49]
[50] public function setLookPosition(float $x, float $y, float $z, float $deltaYaw, float $deltaPitch) : void{
[51] $this->posX = $x;
[52] $this->posY = $y;
[53] $this->posZ = $z;
[54] $this->deltaLookYaw = $deltaYaw;
[55] $this->deltaLookPitch = $deltaPitch;
[56] $this->isLooking = true;

Backtrace:
#0 src/pocketmine/entity/behavior/MateBehavior(60): pocketmine\entity\helper\EntityLookHelper->setLookPositionWithEntity(NULL , integer 10, integer 40)
#1 src/pocketmine/entity/behavior/BehaviorPool(82): pocketmine\entity\behavior\MateBehavior->onTick()
#2 src/pocketmine/entity/Mob(183): pocketmine\entity\behavior\BehaviorPool->onUpdate()
#3 src/pocketmine/entity/passive/AbstractHorse(146): pocketmine\entity\Mob->onBehaviorUpdate()
#4 src/pocketmine/entity/Mob(174): pocketmine\entity\passive\AbstractHorse->onBehaviorUpdate()
#5 src/pocketmine/entity/passive/AbstractHorse(142): pocketmine\entity\Mob->onUpdate(integer 140823)
#6 src/pocketmine/level/Level(900): pocketmine\entity\passive\AbstractHorse->onUpdate(integer 140823)
#7 src/pocketmine/level/Level(826): pocketmine\level\Level->actuallyDoTick(integer 140823)
#8 src/pocketmine/Server(2359): pocketmine\level\Level->doTick(integer 140823)
#9 src/pocketmine/Server(2482): pocketmine\Server->checkTickUpdates(integer 140823, double 1586013276.2865)
#10 src/pocketmine/Server(2250): pocketmine\Server->tick()
#11 src/pocketmine/Server(2100): pocketmine\Server->tickProcessor()
#12 src/pocketmine/Server(1687): pocketmine\Server->start()
#13 src/pocketmine/PocketMine(273): pocketmine\Server->__construct(object BaseClassLoader, object pocketmine\utils\MainLogger, string[16] /home/container/, string[24] /home/container/plugins/)
#14 src/pocketmine/PocketMine(296): pocketmine\server()
#15 (11): require(string[71] phar:///home/container/PocketMine-MP.phar/src/pocketmine/PocketMine.php)

Altay version: 3.11.7+dev [Protocol 389]
Git commit: 10a8ca0
uname -a: Linux bd9f24ca-a3c0-4985-8560-941171c34fa4 4.4.0-164-generic #192-Ubuntu SMP Fri Sep 13 12:02:50 UTC 2019 x86_64
PHP Version: 7.3.14
Zend version: 3.3.14
OS : Linux, linux