page edits won’t save

After the 4.7 update, none of my page edits would save. My host is Siteground and here’s what they said:

The issue was caused due to caching compatibility problems between WP Fastest Cache and the default WP object cache functionality. This has resulted in some leftover data being cached with its older version which has resulted in all changes not being properly visible when accessed without administrative privileges.
To resolve that, I had to manually remove all of this data.

Is there an update in the works? Thanks