Duplicate inline-editing of content causes error and removes content from content block

Permalink 2 2 Browser Info Environment
When editing a content block, it is possible to select a second block and edit simultaneous.
Saving the second block causes an error and after reloading the page it looses its content:
An unexpected error occurred. Call to a member function getBlockTypeHandle() on null < Back to Home.


Watch this demo video:
https://www.useloom.com/share/04a7c1d6c7bc4b1dad3244284495e28c...


Status: New
dbleisch

concrete5 Environment Information

Client side - Chrome Version 60.0.3112.113
---
# concrete5 Version
Core Version - 8.2.1
Version Installed - 8.2.1
Database Version - 20170802000000

# concrete5 Packages
Pixel Theme (1.3.2)

# concrete5 Overrides
None

# concrete5 Cache Settings
Block Cache - On
Overrides Cache - On
Full Page Caching - Off
Full Page Cache Lifetime - Every 6 hours (default setting).

# Server Software
Apache/2.4.27 (Unix) OpenSSL/1.0.2g

# Server API
fpm-fcgi

# PHP Version
7.0.23

# PHP Extensions
bcmath, bz2, calendar, cgi-fcgi, Core, ctype, curl, date, dom, exif, fileinfo, filter, ftp, gd, gettext, gmp, hash, iconv, imap, intl, json, ldap, libxml, mbstring, mcrypt, mysqli, mysqlnd, odbc, openssl, pcntl, pcre, PDO, pdo_dblib, pdo_mysql, PDO_ODBC, pdo_pgsql, pdo_sqlite, pgsql, Phar, posix, readline, Reflection, session, shmop, SimpleXML, snmp, soap, sockets, SPL, sqlite3, standard, tidy, tokenizer, xml, xmlreader, xmlrpc, xmlwriter, xsl, Zend OPcache, zip, zlib

# PHP Settings
max_execution_time - 30
log_errors_max_len - 1024
max_file_uploads - 20
max_input_nesting_level - 64
max_input_time - -1
max_input_vars - 5000
memory_limit - 256M
post_max_size - 1024M
sql.safe_mode - Off
upload_max_filesize - 512M
ldap.max_links - Unlimited
mysqli.max_links - Unlimited
mysqli.max_persistent - Unlimited
odbc.max_links - Unlimited
odbc.max_persistent - Unlimited
pcre.backtrack_limit - 1000000
pcre.recursion_limit - 100000
pgsql.max_links - Unlimited
pgsql.max_persistent - Unlimited
session.cache_limiter - <i>no value</i>
session.gc_maxlifetime - 7200
soap.wsdl_cache_limit - 5
opcache.max_accelerated_files - 4000
opcache.max_file_size - 0
opcache.max_wasted_percentage - 5

Browser User-Agent String

Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.113 Safari/537.36