OPCache wasted memory grows rapidly

Hi there, I run PHP 7.4.12 on a Windows 2019 IIS10 server. For some reason, the wasted memory value in PHP Opcache grows rapidly. For example, these are the statistics after 30mins since the last webserver reset: total memory: 2.00GB used memory: 89.00MB free memory: 1.66GB wasted memory: 261.36MB (12.76%) And these are my settings: opcache.memory_consumption=2048 opcache.cache_id=oc1 opcache.error_log="D:\temp\php\opcache_errors.log" opcache.validate_timestamps=1 opcache.revalidate_freq=90 opcache.interned_strings_buffer=32 opcache.save_comments=0 opcache.max_file_size=0 opcache.file_update_protection=0 opcache.file_cache_consistency_checks=0 opcache.file_cache="D:\temp\php\opcache_filecache" opcache.max_accelerated_files=100000 If I leave it to run more time, the wasted memory could fill up my entire 2GB allocated to Opcache. Also the default value of 5% wasted memory which should trigger an reset on Opcache, it does not seem to work. I monitor Opcache via opcache-gui. Why does this happen? is it an opcache bug? Thanks Alex