Crash involving form changes and swapping egg moves

[Tempo-anon]

See this thread for more details but very commonly reported bug with especially Rotom.

Seems to be failing in the switchMoveHandler of starter-select-ui-handler

index-4c078232.js:7415 Uncaught TypeError: Cannot read properties of undefined (reading 'hasOwnProperty')
    at kY.switchMoveHandler (index-4c078232.js:7415:8767)
    at Object.handler (index-4c078232.js:7415:3362)
    at $Y.processInput (index-4c078232.js:7412:1594)
    at Rb.processInput (index-4c078232.js:7431:2929)
    at Pb.checkInput (index-4c078232.js:7946:34693)
    at Pb.update (index-4c078232.js:7946:14821)
    at Object.step (index-4c078232.js:5019:835)
    at Object.update (index-4c078232.js:5006:3336)
    at Object.step (index-4c078232.js:466:1778)
    at Object.step (index-4c078232.js:470:2728)