This is apparently a Mac Os only bug.
I wasn't able to reproduce it from my win10 VM, but it is still there in v.55.0.2861.0 canary.
The problem seems to come from the .txt
.
It's like it will accept any text/*
files, when this extension is set.
You can star this chromium issue which treats of the same underlying issue (with a different extension).
<input type="file" accept=".txt">
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