Rudder

It appears:

- if you switch between several techniques (for ex "tech 1" > "tech 2" -> "tech 1")
if you delete a technique and go to another
- if you go to a technique, click on resources, go to another technique.

Perhaps other cases. One should test extensively for it.

Note: in all case, the problem seems to be linked with the resources, because in details I've always something like:

Field           Stored value                        New value
Resources     [{"name":"2020-06-05_193148.png","state":"untouched"}]     [{"name":"2020-06-05_193148.png","state":"new"}]