Hi Shwu-jing,
Thanks for your reply. Here are some update from my end.
Did the issue occur with any version of web browsers you tried to access to the survey? Did you try chrome, firefox and Edge and encounter the same issue?
==> For showing existing points, it does not show on Edge (did not try before), and not in Chrome (what I use usually) either. I am wondering if this happened because of cached images? I just tested again, opened feature layers and map, and then opened the survey again. But I do not see this issue anymore.
What version of the suvey123 Connect you used to publish the survey?
The current version I am using is 3.6.137
And what version of web app did you use to open the survey web form(the Settings page on the survey123 website)?
I was not aware of this so far. It's with 3.6 now.
Is it possible you can share the link of the survey? Or you can send it to my email if you prefer?
I am not sure if I can send it, it's confidential now. I need to check with my supervisor.