lsphp73 / 1.6.3+ mysql error

Starting with version 1.6.3, my cli application starts throwing following errors:
"error reading communication packets"

Tried to upgrade to 1.6.4 but the problem persists.

At the end I had to downgrade to 1.6.2.

Any idea?

PS. using lsphp73 with 1.6.2 ... not 71.
PS. tried increasing packet size + timeouts etc @ mysql ... doesn't help though; but that shouldn't be the problem anyway ... when it's working with 1.6.2 just fine
Try to install lsphp separately.
If still get trouble, you can give our support team root access so that they can check your server and figure out.