sfdx force:source:pull doesn't pull changes made in formula fields

### Summary

force:source:pull doesn't pull changes from scratch org made in a formula of custom field and
force:source:status doesn't recognize them as well

### Steps To Reproduce:

1. created a new number custom field - CF1__c
2. created a new formula(number) custom field - CF2__c where I use CF1__c in the formula
3. Both pulled (force:source:pull) successfully
4. changed CF1__c API to CF1Test__c -> SF automatically updated API in the formula of CF2__c field
5. pull changes again

### Expected result

force:source:pull pulls changes of both fields

### Actual result

only CF1Test__c field is pulled and updated, changes inside the formula field CF2__c are not pulled

### Additional information

_Feel free to attach a screenshot_.

**SFDX CLI Version**
sfdx-cli/7.54.4-8ff9ba9cc5 win32-x64 node-v10.15.3

**SFDX plugin Version**
@oclif/plugin-autocomplete 0.1.5 (core)
@oclif/plugin-commands 1.2.3 (core)
@oclif/plugin-help 2.2.3 (core)
@oclif/plugin-not-found 1.2.3 (core)
@oclif/plugin-plugins 1.7.9 (core)
@oclif/plugin-update 1.3.9 (core)
@oclif/plugin-warn-if-update-available 1.7.0 (core)
@oclif/plugin-which 1.0.3 (core)
@salesforce/sfdx-trust 3.0.7 (core)
analytics 1.7.1 (core)
generator 1.1.2 (core)
salesforcedx 48.10.1 (core)
├─ @salesforce/sfdx-plugin-lwc-test 0.1.5 (core)
├─ salesforcedx-templates 48.8.0 (core)
└─ salesforce-alm 48.10.0 (core)

sfdx-cli 7.54.4 (core)

**OS and version**:
Win 10