GRE breaks numerical fields on save

Description of problem:
1) When authoring a new rule, define a fact pattern with a constraint on numerical field (e.g. age > 30). Save the rule. The commit looks OK. Now close the rule, a confirmation asking to discard unsaved changes pops up. Accept and reopen the rule. The "greater than" operator is reset to "please choose".

2) When editing existing rule, constraints on numerical fields are completely erased. Try Bankruptcy history, change yearOfOccurence and save the rule. Check the git commit and reopen the rule, yearOfOccurence and amountOwed are gone.

Version-Release number of selected component (if applicable):
CR1 (community)