This could be related from this post
Consider this template:
[page_title]
type = textfield
size=35
label = Title of the page
[event_date]
type=text
date = true
dateFormat = dd/mm/yyyy
label = New Event Date
class=event-date
[event_title]
hideKey=true
type = textfield
size=35
class=event-title
label=Event Title
[event_desc]
hideKey=true
type = textarea
cols=63
rows =2
class=event-desc
label = Event Description
[event_date]
type=text
date = true
dateFormat = dd/mm/yyyy
label = New Event Date
class=event-date
[event_title]
hideKey=true
type = textfield
size=35
class=event-title
label=Event Title
[event_desc]
hideKey=true
type = textarea
cols=63
rows =2
class=event-desc
label = Event Description
[event_date]
type=text
date = true
dateFormat = dd/mm/yyyy
label = New Event Date
class=event-date
[event_title]
hideKey=true
type = textfield
size=35
class=event-title
label=Event Title
[event_desc]
hideKey=true
type = textarea
cols=63
rows =2
class=event-desc
label = Event Description
[event_date]
type=text
date = true
dateFormat = dd/mm/yyyy
label = New Event Date
class=event-date
[event_title]
hideKey=true
type = textfield
size=35
class=event-title
label=Event Title
[event_desc]
hideKey=true
type = textarea
cols=63
rows =2
class=event-desc
label = Event Description
[event_date]
type=text
date = true
dateFormat = dd/mm/yyyy
label = New Event Date
class=event-date
[event_title]
hideKey=true
type = textfield
size=35
class=event-title
label=Event Title
[event_desc]
hideKey=true
type = textarea
cols=63
rows =2
class=event-desc
label = Event Description
[event_date]
type=text
date = true
dateFormat = dd/mm/yyyy
label = New Event Date
class=event-date
[event_title]
hideKey=true
type = textfield
size=35
class=event-title
label=Event Title
[event_desc]
hideKey=true
type = textarea
cols=63
rows =2
class=event-desc
label = Event Description
[event_date]
type=text
date = true
dateFormat = dd/mm/yyyy
label = New Event Date
class=event-date
[event_title]
hideKey=true
type = textfield
size=35
class=event-title
label=Event Title
[event_desc]
hideKey=true
type = textarea
cols=63
rows =2
class=event-desc
label = Event Description
Step 1. Populate some the fields with data. I used consecutive dates with consecutive titles and descriptions and publish.
Step 2.
Everything is fine.
Step 3.
However edit some of event titles and dates and publish.
Result:
Some fields will be wiped out. Checking the values in the normal custom fields confirms the data is lost.
Settings:
Use wpautop function = true
Disable the save button = true
Disable the quick edit = true
Replace the box title = true