mxid part overlaps time marker and text in develop.element.io while disambiguating

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Description

When two accounts having same displayname are present in a room the mxid part is going over the time marker and extending to the left of the timeline, hovering over it makes it go over the text in the right.

Steps to reproduce

• Open https://develop.element.io/
• Switch to IRC layout
• Create similar displaynames and hover over a message.

Version information

Element version: b96a1551e19f-react-419baebde912-js-9f6ed4fb3381

Platform: Arch Linux, Firefox 89

Related to, #17645 which was fixed.

Will attach a screenshot. Done.

[t3chguy]

I disagree on it being a release blocker given that IRC layout is experimental

[SimonBrandner]

Yeah, you're right, though it wouldn't be bad to have a fix to merge into release. I'll see what I can do