8.3.4 Siemens Enhanced Driver constantly loses connection

Hi, I don't have disconnections every minute with enhanced siemens driver 8.3.4, but I continuously have clock drift detected, and let's say that I often have delays in reading the tags, like post :

I have about 17,000 tags, divided into the tag groups below. The tags that don't require continuous updates have refresh rates of 8,000 ms.
I didn't use leased tags group because switching rates from slow to fast isn't possible. The delay with leased tag can be several seconds, and when I enter the page, I can't wait, say, 10 seconds for the tags to start updating, Therefore, all the underlying groups are directly subscribed.

In this situation, I find that the tags aren't always refreshed at the entered rate, and I have clock drifts that indicate a delay.

Do you also experience these delays, in addition to the disconnection?