This bothered me for a while, and I don't find any bug report regarding this.
Can we have the 'Source' error message finally fixed?
This been how long? Since the release of lightning support? With the release of LWC support, I thought this will be fixed. But it's still present. I literally can't use TWS for lightning development, and my company is thinking of fully dropping TWS because if this bug in favour of Illuminated Cloud, as that don't have this bug.
I really hope, there is a way and a solution for fixing what seems to be a easliy fixable problem.