Pictures deployed with the "includeClientSideAssets": true option are displayed properly in all browsers.
As of April 03, 2018, in Internet Explorer only, such pictures are not displayed properly anymore.

Expected URL, correct in Chrome and Edge:
Actual (wrong) URL in Internet explorer, the GUID part is missing:
This used to work last week (on March 28, 2018). The problem has been observed in two different tenants.
"includeClientSideAssets": true option.src\webparts\myWebPart\assetsconst pictureUrl = String(require("../assets/myPicture.svg"));
...
<img src={pictureUrl} />
Same issue here
We are looking into this, thx for submitting.
Same here. I've just made copy of assets in ClientSideAssets library as a workaround but it has to be fixed. I'm waiting for fix.
This issue has now been fixed and the change will start rolling out to production on May the 13th. Thank you for notifying us of this issue.
Issues that have been closed & had no follow-up activity for at least 7 days are automatically locked. Please refer to our wiki for more details, including how to remediate this action if you feel this was done prematurely or in error: Issue List: Our approach to locked issues
Most helpful comment
We are looking into this, thx for submitting.