4 days already we have delays in getting events meeting.participant_joined 20 minutes thrue webhook. can it be some maintenance problem?

Client sending screenshot that he enter but  even in reports after meeting event meeting.participant_joined delays on 20 min

I am using Zoom One Pro.  I use it for one to one meetings.  I have found quite often I start the meeting as host and am waiting on zoom and am unable to admit the participant from that window.  I receive a message in my email informing me the person is in the waiting room and then have to close down the meeting I was waiting on and re-open it from the link in the email.  This means that the meeting starts late.  The confusing thing is that sometimes it does allow me to admit the other from the host window I've already opened.  Can anyone advise me what is going wrong when this is not enabled?

Audible notifications are a major and persistent distraction in Zoom meetings (and sometimes an embarassment, when it becomes obvious people are IMing with each other behind the scenes), whether they come from Outlook, Slack, Teams, or another app. There does not appear to be any feature in Zoom to silent external app notifications when a meeting is active. The user can manually disable sounds, turn on Focus Assist on Windows, or Do Not Disturb/Focus mode on OSX, but most users will never remember to do this.

Is there any way to make this happen automatically? Does anyone know if Windows Focus Assist (and the Mac equivalent) have APIs that Zoom could call to mute local sounds during meetings? Is there any third-party software that might accomplish this goal?

There does appear to be at least an undocumented API to Focus Assist, mentioned at https://stackoverflow.com/questions/55477041/toggling-focus-assist-mode-in-win-10-programmatically

I'm using 1GB LAN and

Samsung Pen laptop

Zoom Meeting Desktop Client is up-to-date(new update last night)

No error codes, however, ever since I've updated, I've noticed that the buttons won't response quickly.

Even the audio(from host's microphone) lags from time to time by few seconds. It will eventually go back to normal but sometimes it lags. We're doing online teaching so this is a serious problem for us.

Anyone else experiencing something similar?