Problems with avatar image processing while using Imagemagick

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Hello,

I'm having a few issues while using imagemagick as the default image processor, whenever i try to upload an avatar i get the following error:

RuntimeException: Failed to save image to temporary file; image may be corrupt or check internal_data/data permissions in src/XF/Service/User/Avatar.php at line 263
XF\Service\User\Avatar->updateAvatar() in src/XF/Pub/Controller/Account.php at line 466
XF\Pub\Controller\Account->actionAvatar() in src/XF/Mvc/Dispatcher.php at line 321
XF\Mvc\Dispatcher->dispatchClass() in src/XF/Mvc/Dispatcher.php at line 244
XF\Mvc\Dispatcher->dispatchFromMatch() in src/XF/Mvc/Dispatcher.php at line 100
XF\Mvc\Dispatcher->dispatchLoop() in src/XF/Mvc/Dispatcher.php at line 50
XF\Mvc\Dispatcher->run() in src/XF/App.php at line 2177
XF\App->run() in src/XF.php at line 390
XF::runApp() in index.php at line 20

If i switch back the default image processor to GD it works perfectly leading me to belive that this is not a problem with directory permissions (Both directories have 0777 permissions).
I belive that this issue is not related to xenforo itself but with my custom php-fpm container, here's the build script that i'm using:

FROM php:7-fpm-alpine
RUN apk update \
    && apk add --no-cache \
      autoconf \
      coreutils \
      freetype-dev \
      libjpeg-turbo-dev \
      libltdl \
      gmp-dev \
      imagemagick-dev \
      libmcrypt-dev \
      libpng-dev \
    && docker-php-ext-install mysqli \
    && docker-php-ext-configure gd --with-jpeg-dir=/usr/include/ \
    && pecl install apcu imagick \
    && docker-php-ext-enable apcu imagick \
    && docker-php-ext-install gd \
    && docker-php-ext-install gmp \
    && rm -rf /var/cache/apk/*

I'm thankful for any tips on what i could be doing wrong.