url with port not resolved in browser

I have a Raspberry Pi on my local network, which I can ssh into using either it's IP address or the zeroconf .local hostname:

• ssh pi@192.168.n.m connects
• ssh connects

A web service is running on the rpi that I can access in chrome via the IP address BUT not with the .local hostname

• opens in chrome
• cannot be reached

How to open this website in chrome with the raspberrypi.local domain?

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