UserAgent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3202.89 Safari/537.36

Steps to reproduce the problem:
1. define a hotkey in ~/.XCompose e.g.
    <Multi_key> <a>              : "ä"   adiaeresis
2. restart the X server to reload .XCompose (e.g. reboot)
3. define a multi key e.g.
    setxkbmap -option compose:ralt
4. open chromium, focus any textbox (i.e. the omnibar) press ralt -> a

What is the expected behavior?
the ä symbol should appear

What went wrong?
nothing happens - but it remains in some sort of multi key state, pressing a again inputs å

Did this work before? Yes latest chromium on debian 8

Chrome version: 62.0.3202.89  Channel: stable
OS Version: Debian 9
Flash Version: 

reopening  issue #506838  just as the bot said, as this seems to affect multiple people using debian 9 + chromium. It might be a bug specific to an input library version included in debian 9 as if i recall correctly it did work on debian 8. According to the previous issue at least one other person has the same problem running the same debian version.