sstp connection zombie

HI,
i have a problem with sstp sessions.
in active-connections some connections, when disconnected, remain zombies and recreate new ones. There are cases that even 50 zombie elements of the same connection are created.
RouterOS 7.2.2.
the client sstp/pptp are router LTE mikrotik RouterOS 6.47.9 or 6.47.10
How can I solve this problems?

Thank you

Have you received a fix for this issue?
Our SSTP server on Mikrotik CCR2116-12G-4S+ regularly supports 2600+ continuous SSTP connections from Mikrotik 951G-2Hnd SSTP client devices and 10-25 zombies per day are generated. Our 951G SSTP client devices are set to reconnect on failure SSTp connection failure.
Our zombie PPP characteristics include 1) a blank Encoding value (rather than the normal AES256-CBC value) and 2) a status of Dynamic (but not the normal DR - Dynamic and Running).
We have seen this issue on ROS 6.x (through 6.49) and on several versions of ROS 7.x (including 7.11.3, currently running in our production), so it does not seem to be a ROS release specific issue.

ppp active remove [find where encoding!="AES256-CBC" and service=sstp]

Have had a similar, automated fix in for months. More wondering what’s the specific cause.
In any case, thanks for the thoughts. have a great day.