Volto 19 alpha 24 in dev mode crashes after some clicks

Does this sound familiar to you?
I am clueless where to start debugging…

🎭 Volto started at 0.0.0.0:3000 🚀
(node:66058) [DEP0060] DeprecationWarning: The `util._extend` API is deprecated. Please use Object.assign() instead.
(Use `node --trace-deprecation ...` to show where the warning was created)

/Users/katjasuss/Volto/pipapo/frontend/node_modules/.pnpm/superagent@3.8.2/node_modules/superagent/lib/utils.js:61
  delete header['content-type'];
  ^
TypeError: Cannot convert undefined or null to object
    at Object.exports.cleanHeader (/Users/katjasuss/Volto/pipapo/frontend/node_modules/.pnpm/superagent@3.8.2/node_modules/superagent/lib/utils.js:61:3)
    at Request._redirect (/Users/katjasuss/Volto/pipapo/frontend/node_modules/.pnpm/superagent@3.8.2/node_modules/superagent/lib/node/index.js:426:21)
    at ClientRequest.<anonymous> (/Users/katjasuss/Volto/pipapo/frontend/node_modules/.pnpm/superagent@3.8.2/node_modules/superagent/lib/node/index.js:822:19)
    at Object.onceWrapper (node:events:623:26)
    at ClientRequest.emit (node:events:508:28)
    at HTTPParser.parserOnIncomingClient [as onIncoming] (node:_http_client:780:27)
    at HTTPParser.parserOnHeadersComplete (node:_http_common:123:17)
    at Socket.socketOnData (node:_http_client:615:22)
    at Socket.emit (node:events:508:28)
    at addChunk (node:internal/streams/readable:559:12)
sswp> !!! Script exited with code 1

What were you doing when the error happened? What is that code in the superagent library doing? Can you add code there to output more information?