etc crontab syntax bug

A bug that occurs when using crontab:

In the file /etc/crontab the following line works correctly and writes A to /root/cronlog

* * * * * root echo A >> /root/cronlog 2>&1

for some reason this line does not work

* * * * * root echo B &>> /root/cronlog

In bash both commands execute as expected

echo C >> /root/cronlog 2>&1
echo D &>> /root/cronlog

Also escaping percentage signs is necessary or an error will occur.

Both bugs occurred when setting up cron jobs on the main server.