With "iPhone and Mac" you mean the browser Safari, right?
If you e.g use Firefox on MacOS or iOS the issue is not there, right?
I remember the issue in the Samsung browser on mobile devices.
The ticket never was really solved.
bugs.limesurvey.org/view.php?id=14666
I recommend you create a new, simple survey. If you can reproduce the issue, I recommend to open a bugticket and attach a LSS export file.
Infos about browser version / os version should be part of that ticket.
I don't see any changelog in the last few updates of LimeSurvey.
Code:
Changes from 3.22.11 (build 200330) to 3.22.12 (build 200406) April 6, 2020
-Fixed issue #16074: Wrong survey url when directLogin from beforeRegister event (Marko Bischof)
-Fixed issue #16069: Deactivate survey using tokens in Postgres 12 shows error (Carsten Schmitz)
-Fixed issue #15987: Move surveys from group A to group B now shows correct message "success" when saving was successful (Patricia Stelling)
Changes from 3.22.10 (build 200323) to 3.22.11 (build 200330) March 30, 2020
-Fixed issue: Quota not working for array 10-point (Olle Harstedt)
-Fixed issue 16037: Trim entered e-mail addresses (fkroener)
#Updated translation: Italian by lfanfoni
#Updated translation: Italian (Informal) by lfanfoni
#Updated translation: French (France) by c_schmitz, DenisChenu
#Updated translation: Finnish by Jmantysalo
#Updated translation: Croatian by rovinj
#Updated translation: Catalan by qualitatuvic