[BUG] Device specific page broken

[CodeFinder2]

Describe the bug

For most of my devices, I am not able to open the device specific page (by clicking on a device in the device list). It may be related to a slash '/' in the friendly_name / MQTT topic of the device? For the first 3 devices (0x...) in the 2nd screenshot, it is working fine. But not the 4th and 5th devices, showing what is visualized in the 1st screenshot. Sorry to come up with another 🐛... :see_no_evil:

All other devices in my list contain a slash and their dev spec page does not show up properly (although the content seems fine).

Latest dev (.137) and Z2M v1.10. Hassio, arm64

Screenshots

Pertinent logs

Generates no log messages.

Edit: coordinator page works as well.

[CodeFinder2]

Update: it's not only visually broken. If I click on a device and try to forcefully delete it

503: Service Unavailable

is shown. Nothing printed in Z2M and Z2MA's log (but the latter also don't crash).

[CodeFinder2]

@carldebilly can you confirm/reproduce this bug? 🙈 Z2MA is currently unusable for me this way 😶, so I would be very grateful for a fix 🙏

Edit, and still with Version of Zigbee2MqttAssistant (this software): 0.3.145 (0.3.145+Branch.master.Sha.7f6f10bc4855cba9870fd0d08ece33148f303ea9) Release Version of Zigbee2Mqtt: 1.11.0

[CodeFinder2]

This still happens for the latest version: Version of Zigbee2MqttAssistant (this software): 0.3.162 (0.3.162+Branch.master.Sha.0abe23d047fd9ee087053069b6a3246b8a70b2ae) Release Version of Zigbee2Mqtt: 1.12.2 Coordinator version: 20200328 Coordinator Zigbee Id: 0x00124b001ca5fdaf

Would still be very grateful for a fix since Z2MA is currently unusable for me 🙈