Template loses field assignments

[psy]

After creating fields and assigning to a template, I added pages with the template. All good.

At one point, I had an admin edit page open to view the data and the template configuration in another browser tab to check the field names as I was coding the layout offline.

I edited the page and submitted. I then viewed the front end page in another browser tab which showed nothing? Went back to the template config tab and refreshed it. All 35 x fields, including the title field were dropped from the template!!!

I checked in phpMyAdmin and my custom fields were all there with, eg land_measurement:

{"inputfieldClass":"InputfieldSelect","tags":"property","collapsed":0,"send_templates":[41],"showIf":"land_area!=''","columnWidth":80}

where [41] matched my template id. Everything else in the template configuration was correct.

What happened to the field assignments in the template? How can I recover them without having to reconstruct the template?

More importantly, what caused this behaviour so I can avoid it in the future?

Using:

PW  2.6.1

Apache version 2.2.29

PHP version 5.4.40

MySQL version 5.5.42-37.1-log

PS: I also had a template lose its fields on another site running an earlier PW version on a different host.

Any ideas?

TIA

[diegonella]

In my time I also with PW 2.6.1 with an integer field.

Via API will reasing value and was again visible in the admin