NC11 PHP 7.1 high Physical Memory Usage 436,09 MB

I’ve set the PHP from 7.0 to 7.1 because WebDav does have a problem with file uploading. (other threat)

With PHP 7.1 enabled everything is working but the server gives a Physical Memory Usage of 436MB!
I have 512 MB available so 85% is directly used by NC.

Can I see where or what process is using up this memory?
When I close NC client, the memory use is gone!

As in your other thread, please report all PHP 7.1 issues directy to the bugtracker.