Hi, I have a weird issue regarding image upload. I'm using own Win server 2012 R2, providence 1.6.3, php7, apache 2.4, MySQL 5.7. Images will be uploaded to a network drive. Everything was perfect until 2 weeks ago, the image upload speed suddenly slow down to 10%, but uploading movie and pdf is normal. I don't think I have made any changes to conf. I'm using Graphicsmagick to process. One more thing I noticed is that in normal speed, the gm.exe will appear sticking on the task manager until 1 photo is done. But now the gm.exe keep open and close, wait for some time then re-open. Do you have any idea what would go wrong? Thanks!