I have had this problem before, and now it is all of a sudden back again.
I have a grouped field with the date type field. I can add two dates to the grouped field, but when I wanna add the third, is just erases the first value when saving !!???
Has this something to do with PHP settings, when saving a user list page with a lot of grouped fields ?

It is the same problem as I had here: www.joomlapolis.com/forum/professional-members-support/245209-field-group-bug?start=12#330839
So why is this happening again now - on the same site ??

On of the users for whom I cannot store more than two dates has this in the grouped field in database: {"2":{"cb_teammode":"2023-01-19"},"1":{"cb_teammode":"2023-04-12"}}
Should it be 1 first and then 2 ?? Or does that not matter ??

I now use the default field layout - still the same problem. I see this POST request when saving the field:

---

31765789258389860061189047332
Content-Disposition: form-data; name="_cb_teammoder__3__cb_teammode"

2023-01-25

---

31765789258389860061189047332
Content-Disposition: form-data; name="_cb_teammoder__2__cb_teammode"

2023-03-22

---

31765789258389860061189047332
Content-Disposition: form-data; name="_cb_teammoder__2__cb_teammode"

2023-05-24

---

31765789258389860061189047332
Content-Disposition: form-data; name="_cb_teammoder__count"

3

---

31765789258389860061189047332
Content-Disposition: form-data; name="6f5d50aecdf6ec7d582a8d8334f30167"

1

---

31765789258389860061189047332
Content-Disposition: form-data; name="cbrasitway"

cbrv1_466497e32ca605e57a6ab412ca80e635_HR7KQVHXkbmNXkhP

---

31765789258389860061189047332--


The seems to be two values with the same id number: _2_  and therefor only two dates are stored ??

I have sent you a PM