Hi,
I'm not sure your situation, but I'd like to share my experience.
Upper case label is shown when en-us.json files are not loaded properly.
You can see correct sentence in <RA Server>/webapps/datamanagement/i18n/en-us.json.
"STEP": {
"DESCRIPTION": {
"RELEASE_PARAMETERS": {
"NON_EDITABLE": "View release parameters assigned to this server type. The values of release parameters can differ between deployment plans."
If the label is always upper case, it is possible to affected by side effect of upgrade.
However, you said that it sometimes occurred. So, tomcat on NAC maybe unstable.
On the other hand, the reason why parameters are incorrect value maybe DB cache problem - LevelDB.
I suppose it was occurred by high workload on NAC, DB server or network.
If this problem is occurred frequently, I recommend to open a support case.
Thanks
Yas