For: camunda version 4.6.16 , Spring boot application.
There is an Issue while creating filter criteria on task list when we select ignore case checkbox .
steps to reproduce:

1. Navigate to the Task list.

1. click on Filter Tasks

1. select Process Variable , mention name of the variable and value to filter the task on.
   4)select ignore case checkbox, as we check the checkbox , there is an error printed in console(developer tools).
   Error is: deps.js?bust=7.16.0:36

TypeError: Cannot read properties of undefined (reading 'mappedOptions')
at t (camunda-tasklist-ui.js?bust=7.16.0:18)
at camunda-tasklist-ui.js?bust=7.16.0:18
at Object.E [as forEach] (deps.js?bust=7.16.0:36)
at T (camunda-tasklist-ui.js?bust=7.16.0:18)
at D (camunda-tasklist-ui.js?bust=7.16.0:18)
at l.$digest (deps.js?bust=7.16.0:36)
at t.$apply (deps.js?bust=7.16.0:36)
at Object.$$debounceViewValueCommit (deps.js?bust=7.16.0:36)
at Object.$setViewValue (deps.js?bust=7.16.0:36)
at HTMLInputElement. (deps.js?bust=7.16.0:36)

1. Now when we change the value of Process Variable in filter critera and naviagte to somewhere in the application and come back to task list.
   Expected is: Filter with changed value of process variable should persist.
   Actual: modified value of the process variable in filter is reset to old value.

console logs after checking the checkbox (ignore case)