Our On-prem environment gives e.text is not a funcation frequently

While moving our environments from the Linux VM to Kubernetes, (Initial we are on Appian 25.3 version and recently we are moved to 26.3 but this issue remains) we started facing some issues with Appian like, 

• 

  

  or 

  

Note: This is not related to code. 

Does, anyone else also got these kind of issues and how you resolved this.