I was able to reproduce this issue if paste text like `Mozilla Firefox` which is u+3000 ideographic space. Regression window: https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=81bec1bb5b4e34a819dc9159b194f1896edd2436&tochange=22e706c2ff1d4469907bc44c8c1bc256512553e7
Bug 1834218 Comment 2 Edit History
Note: The actual edited comment in the bug view page will always show the original commenter’s name and original timestamp.
I was able to reproduce this issue if paste text like `Mozilla Firefox` which includes u+3000 ideographic space. Regression window: https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=81bec1bb5b4e34a819dc9159b194f1896edd2436&tochange=22e706c2ff1d4469907bc44c8c1bc256512553e7
I was able to reproduce this issue if paste text like `Mozilla Firefox` which includes u+3000 ideographic space. And also reproduce if paste text includes new line. Regression window: https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=81bec1bb5b4e34a819dc9159b194f1896edd2436&tochange=22e706c2ff1d4469907bc44c8c1bc256512553e7