work with DB: button text broken (FF)

Steps to Reproduce

http://zktest:8089/keikai-demo/database (browser: Firefox 71.0 / Chrome doesn't have this issue)

(1) click "add my new expense" 

(2) click "done", then the "add my new expense" button layout is broken

(sometimes doesn't happen for the 1st time. repeat 2 or 3 times then it will happen)

Current Result

Expected Result

Debug Information

Workaround