Jigoshop causing lots of server log errors

Hi

I’m running WordPress 4.1.1 with Jigoshop 1.17.1 and I’m seeing lots of errors in my server logs. If I deactivate Jigoshop they instantly stop, then start again when I reactivate.

My server is a standard ServerPilot VPS (Apache in front of Nginx, PHP5.6, MySQL5.5, plenty of spare memory and CPU).

In php5.6-fpm.error.log I see the following on every admin page load:

[17-Apr-2015 16:59:35] NOTICE: [pool slg] child 21405 started
[17-Apr-2015 16:59:40] WARNING: [pool slg] child 21404 said into stderr: "zend_mm_heap corrupted"
[17-Apr-2015 16:59:40] WARNING: [pool slg] child 21404 exited with code 1 after 8.783149 seconds from start

And in the Apache error log:

[Fri Apr 17 17:05:05.507967 2015] [proxy_fcgi:error] [pid 17422:tid 140697793443584] [client MY.IP.ADDRESS.HERE:47216] AH01067: Failed to read FastCGI header, referer: http://mysiteurl/wp-admin/index.php
[Fri Apr 17 17:05:05.508032 2015] [proxy_fcgi:error] [pid 17422:tid 140697793443584] (104)Connection reset by peer: [client MY.IP.ADDRESS.HERE:47216] AH01075: Error dispatching request to : , referer: http://mysiteurl/wp-admin/index.php

Memory limit is 64MB, PHP time limit is 300.

https://ww.wp.xz.cn/plugins/jigoshop/